Two dealers buy the same car at the same sale for the same hammer price. Ninety days later, one of them made money on it and one of them didn't — and neither the car nor the price was the difference. The difference was that one of them knew, before bidding, what the car would actually cost by the time it was front-line ready.
Hammer price is not your cost
The number the auctioneer says is the smallest version of what you'll pay. On top of it stacks a list that's easy to recite and easy to forget in the lane:
- Buy fee. Almost every channel charges a tiered fee based on sale price. On a mid-priced wholesale unit it's commonly a few hundred dollars — real money that comes straight out of your gross.
- Online / simulcast fees. Buying through a screen usually adds its own line item on top of the buy fee.
- Transport. The cheap car three states away is not cheap. Get a real per-mile quote before you bid, not after you win.
- Baseline recon. Even a clean car gets a detail, a safety check, and usually a minor repair or two before it's ready to retail.
- Holding cost. Every day a car sits, it costs you — interest if it's floored, and opportunity cost either way.
Work out your break-even before you bid
The discipline that separates consistent buyers from lucky ones is doing this math backwards, in advance:
- Start from what the car will realistically sell for in your market.
- Subtract the margin you need to make the deal worth doing.
- Subtract your recon estimate from the condition report — then pad it, because condition reports are optimistic.
- Subtract the buy fee and a real transport quote.
- What's left is your maximum bid. When the lane passes it, you're out.
Written down, it sounds obvious. In a fast lane with a car you like, it's the hardest rule in the business to keep — which is exactly why the dealers who keep it win.
Different channels, different math
Fee schedules, arbitration policies, and typical condition-report accuracy all differ between channels — OPENLANE, Manheim, ACV, and your local independent sale each have their own economics. The only way to know where your money is made is to track outcomes per channel: what you paid all-in, what you sold for, and how often a buy turned into an arbitration case. Most dealers who do this find their instinct about their "best" channel is off by more than they expected.
Arbitration is part of your cost basis too
When a car shows up with an undisclosed problem, the arbitration window is short — usually days, not weeks. File inside it, and any credit or price adjustment you win should be recorded against that specific car, not dropped into a general ledger where it disappears. A $600 arbitration credit changes that car's break-even by $600; if your records don't reflect it, your profit number is fiction in both directions. (Flux handles this with arbitration & returns recorded per vehicle — profit and balances update automatically.)
Track it per VIN or it didn't happen
All of this only works if the numbers land on the car. An itemized buy — vehicle price, buy fee, and transport as separate lines — plus every recon expense captured against the VIN gives you a true cost basis on every unit. Do that consistently and the question "should I buy this car?" stops being a feeling and starts being arithmetic you can check from the lane on your phone.
If you're doing this in a notebook or a spreadsheet today, it works — until volume makes it not work. That's roughly when a system that does the stacking for you pays for itself.