One of you asked me about a car that's been sitting for 200 days when the average is 56. Is 15% off before incentives a crazy offer? Most buyers either lowball a number that insults the salesperson — or they leave money on the table because they're scared to ask for too much. Neither one is based on anything real.
There's an actual number underneath whatever percentage you're thinking of asking for: floor-plan cost, how long the unit's been sitting, and what it would cost the dealer to keep carrying it versus making your deal. Once you know that number, 15% either makes total sense or it doesn't — and I'll show you which. After 25 years selling cars, I've sat in the rooms when management decided which aged vehicles were worth taking a loss on. Here's how to size your ask instead of guessing.
- Why Used Cars Sit — And What It Costs the Dealer
- How to Size Your Offer: A Framework, Not a Formula
- End of Year on a Used Car — What's Actually Different
- The Two-Customer Standoff — Why Reasoning Beats a Round Number
- How to Sell the Dealer on Taking the Loss
- Watch the Full Video
- Frequently Asked Questions
When you present your offer, say your reasoning out loud — not just the number. "I'm offering $27,000 because comparable units at similar mileage and equipment are listed at this price at three dealerships I contacted today" is a completely different conversation than "I want to pay $27,000." One forces the dealer to argue with market data. The other gives them a round number to negotiate around. The reasoning is what makes the offer defensible.
Why Used Cars Sit — And What It Costs the Dealer
Before you can size your offer correctly, you need to understand why the car has been sitting — because not every aged unit is sitting for the same reason, and that distinction matters for how aggressively you can negotiate.
Here's a real scenario I watched play out more than once. A used car manager buys eight white Camry LEs — same color, same black interior, all with 28,000 to 30,000 miles, all priced similarly. He's cornered the market on that specific configuration. The first four or five sell quickly because that's exactly what buyers are looking for. Then the last two or three start sitting at 60 days. Same car. Nothing wrong with them. Just too many of the same thing at once.
Then there's the car nobody wants to show because it had a bad smell. Three different salespeople showed it. Three different buyers walked away. Now there's a stigma attached to it internally — nobody's putting that one first anymore. Or the one that came in fully loaded, priced $3,000 higher than the LE version, but most buyers in that market would rather take the base model than pay for equipment they didn't ask for. Or the one that's front-wheel drive in a market that snows six months a year.
None of those cars have anything mechanically wrong with them. They're just mismatched to the market — wrong color, wrong spec, wrong timing. The car itself isn't the problem. But it's still costing the dealer money every single day it doesn't move.
Every day a used vehicle sits, the dealer is paying floor-plan interest on it — a percentage of whatever they paid to acquire it. They bought a car for $20,000, they're paying daily interest on that $20,000. Meanwhile the car is depreciating. By the time it's been sitting 60, 90, 120 days, they may have paid $20,000 for a vehicle now worth $18,000. Now they're underwater — and the only choices left are selling it at a reduced retail price or sending it to auction. I've personally watched management send units to auction at a $3,000 to $4,000 loss rather than keep carrying them. That loss is real. That's the number you're working against when you make your offer.
Nobody's going to hand you their floor-plan statement. But that math still works in your favor even without it — because the longer a unit sits, the closer it gets to that auction-loss threshold, and your offer represents an alternative to taking that loss. That's what makes the percentage defensible. It's not a negotiating tactic. It's an estimate of the dealer's own avoided cost.
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Download Free PDF →How to Size Your Offer: A Framework, Not a Formula
There's no magic formula that spits out the right discount percentage for every aged unit. But there is a directional framework that gets you to a defensible number — one the dealer can't simply wave off.
Start with the market data. Before you think about a percentage, go to Cars.com, CarGurus, and Autotrader. Find comparable vehicles — same make, model, trim, mileage range, and equipment — and note their asking prices. This tells you what the market is actually commanding for that vehicle right now. If the car you're looking at is already $2,000 below every comparable listing, that context matters. The discount you're asking for needs to be measured against real market pricing — not against the sticker on the specific unit you want.
Apply a scale based on how far past average it's sitting. A unit at 1.5x its average days-on-lot (say, 90 days on a 60-day-average lot) supports a modest ask — maybe 5% to 8% below the asking price, depending on where that asking price sits relative to market. A unit at 3.5x its average (200 days on a 56-day-average lot, like the comment that prompted this video) supports a mid-teen percentage ask. The further past the turn-time threshold, the more defensible the larger ask becomes — because the auction-loss alternative is getting closer and more expensive for the dealer.
Know the floor and ceiling. Under 5% on a genuinely aged unit leaves real money on the table — you're not using the leverage available to you. Over 25% invites the dealer to dismiss your offer as non-serious rather than counter it. The sweet spot on a deeply aged unit — one sitting well past its average turn time and priced in line with the market — is typically in the 10% to 15% range. 15% on a $30,000 car is $4,500 off. That's a significant ask. Whether it's reasonable depends entirely on how long the unit has been sitting and how the asking price compares to real market data. Do that work first, then land on your number.
Present the reasoning, not just the number. This is the part most buyers skip. When you walk in and offer $27,000 on a $31,000 vehicle, the first question a manager asks is: "Why $27,000?" If your answer is "I just think that's what it's worth" — you're easy to talk off of it. Information is what makes a number unarguable, not attitude. "I'm offering $27,000 because comparable units at the same mileage and equipment are listed at three dealers within 30 miles of here at this price, and I contacted all three today" — that's a number the dealer has to engage with instead of dismiss.
End of Year on a Used Car — What's Actually Different
In the last episode I said the calendar doesn't run used-car leverage — days-on-lot does. That's still true. But the end of the year does add something worth knowing about on a used vehicle, and it's worth reconciling those two ideas clearly.
From December 26th through the 30th, dealerships are pushing hard to stack their year-end unit numbers — primarily on new vehicles. That quota pressure is real and it's significant on new cars. On a used car, it's a secondary effect rather than a primary driver. The salesperson and manager are motivated to sell more units across the board to hit year-end targets — so they may be more willing to deal on an aged used vehicle in that window than they would be in October. That compounding effect is real.
But here's the watch-out: at year end, a dealership that has an aged used car on the lot is also likely to push hard to switch you into a new vehicle. They're chasing new-car quota numbers, and a buyer who comes in for a used car is a conversion opportunity for them. Be aware of that redirect — it's not random, it's structured — and stay anchored to the vehicle you researched if the used car is genuinely the right choice for your situation.
The bottom line: end-of-year stacks on top of days-on-lot leverage when both apply. It doesn't replace it. A deeply aged used unit at year end gives you more leverage than a deeply aged unit in March — but the days-on-lot number is still the primary driver. The calendar adds to it, not the other way around.
The Two-Customer Standoff — Why Reasoning Beats a Round Number
Two buyers walk into the same dealership for the same aged used car. Buyer A pulls a number out of thin air — they're nervous, they figure it's a reasonable place to start. Buyer B has done the research. They know what the market is commanding, they've checked comparable listings, and they've arrived at 10% off with a clear explanation for why.
When Buyer A makes their offer, the manager's first move is to ask: "How did you come up with that number? Why $27,000 and not $28,000 or $26,000?" If Buyer A can't answer that question with data, they're easy to move. The manager doesn't have to argue with the number — they just ask the question and wait for the hesitation. That hesitation tells them everything: this buyer doesn't have a foundation, and a little pressure will move them.
When Buyer B makes their offer, the conversation is different. "I'm offering $27,000 based on three comparable listings at similar mileage and equipment — here they are — all priced within $200 of each other, all at dealers within 30 minutes of here. I contacted each of them today. They're available. But I wanted to give you the opportunity to earn my business." Now the manager has to engage with market data, not just a number. And there's something else working in the background that most buyers never consider.
A dealer can talk you out of a round number. They can't talk you out of math they already know is true.
The dealership already knows what it cost to get that buyer through the door — anywhere from $350 to $500 in marketing spend per customer who walks onto the lot. If Buyer B leaves without buying, that's not just a lost sale. It's lost service revenue, lost referrals, and a customer who goes to one of those three other dealerships Buyer B mentioned. A prepared buyer with documented alternatives has leverage the dealership can feel — even when they're holding firm on the surface.
How to Sell the Dealer on Taking the Loss
On a deeply aged unit where you're asking for a meaningful discount, you're not just presenting a number — you're giving the manager a reason to take the loss instead of sending the car to auction. Here's what that looks like in practice.
Tell them you'll be a happy, vocal customer. You'll send referrals. You'll leave a positive review. You'll do your service business at their dealership. Make a specific list of reasons why it's worth less money now but more business over time. Dealerships make money in their service departments — a customer who buys and services at the same location is worth significantly more than the front-end gross on the deal. Give them a version of that math to think about.
Then frame the alternative directly: "You can send this to auction and take a real loss, or you can sell it to me, make a happy customer, and earn the service business going forward." You're not threatening. You're presenting the comparison they're already making internally. The manager is sitting there thinking about the auction-loss number anyway. You're just making sure the retail alternative — which is you — looks more attractive than the alternative they're already anticipating.
This doesn't mean you'll always get to your number. Management has constraints — they're not looking to take a major loss on a pre-owned vehicle because of how it affects their compensation. But framing the offer around the dealer's incentives rather than just your own preferences gives you the best possible chance of getting movement. Days-on-lot is what creates the opening — how you present the offer is what determines whether you walk through it.
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Here's the complete breakdown — including the two-customer standoff in real time, the floor-plan math behind the 15% question, and why the reasoning behind your number matters more than the number itself.
This video follows directly from Episode 7 — Why That Used Car Has Been Sitting on the Lot — which covers how to find the days-on-lot number and why it's the real leverage number on any used vehicle. Watch both before your next used car negotiation.
Frequently Asked Questions
Is 15% off a used car a reasonable offer?
It depends on the math underneath it — not the percentage itself. On a vehicle sitting at roughly 3.5x its average days-on-lot, a mid-teen percentage ask is defensible because it's comparable to the loss the dealer faces at auction. On a vehicle sitting at average turn time and already priced below market, 15% is likely too aggressive. The percentage needs to reflect the dealer's actual carrying cost and the vehicle's position relative to current market pricing — not a round number you chose because it felt right.
How do I calculate what to offer on an aged used car?
Three inputs: the market data (comparable listings on Cars.com, CarGurus, and Autotrader for the same vehicle, same mileage, same equipment), the days-on-lot number relative to that model's average turn time, and the asking price relative to comparable units. The further past average turn time and the closer the asking price is to market, the larger a discount ask becomes defensible. Use those three data points to arrive at a specific number — then present the reasoning alongside the offer.
Why does saying my reasoning out loud matter?
Because a round number you can't explain is easy to negotiate against. "Why $27,000? Why not $28,000?" If you can't answer that question with data, you'll fold under the pressure. A number backed by comparable listings, documented days-on-lot, and competing dealer options forces the manager to engage with market data rather than just applying pressure to a number that has no foundation. A dealer can talk you out of a round number. They can't talk you out of math they already know is true.
Does buying a used car at year end give me more leverage?
Modestly — it stacks on top of days-on-lot leverage when both apply. Dealerships push hard on unit counts at year end, which can make them more willing to move on an aged used vehicle to pad their numbers. But be aware: at year end, a dealer with a used car on the lot is also likely to try to redirect you into a new vehicle. The year-end quota pressure runs strongest on new inventory. Stay anchored to the vehicle you researched if the used car is genuinely the right choice.
What if the car is already priced below the market?
That changes the calculation significantly. If a vehicle has been sitting 90 days but is already priced $2,000 below every comparable listing on the market, the dealer has already made a significant concession. Asking for another large discount on top of a price that's already below market is unlikely to land well — and the manager can counter it with real data showing the vehicle is already priced aggressively. The discount ask needs to be grounded in where the asking price sits relative to the current market, not just in how long the vehicle has been on the lot.
How do I find out how long a used car has been on the lot?
Ask directly — "How long has this one been on your lot?" — and cross-reference the answer against the listing's days-on-market indicator on Cars.com, CarGurus, or Autotrader. Watch for price-drop history on the listing as well. Multiple markdowns over time signal a vehicle that hasn't been moving. Pull a Carfax at the same time to confirm a clean title. You want the days-on-lot number and the vehicle history together before any offer is made. The full research process is covered in Episode 7 of this series.