I actually pulled off a stunt like this at a dealer when I was buying a company car. I balked at the price and he brought in the finance guy. I ended up buying the car a dead dealer cost, but I financed the car at 24.9% for 60 months on a $21k car.
I had read the finance contract and noted there was NO early payoff clause...LOL I paid off the car the day the Finance company got the paperwork.
A few days later I get a call from the sales guy, GM, SM and the Finance guy.
Told them all the same thing, I walked in and wanted to buy a car for my company I owned, it was a ALL CASH sale, but you guys would not deal on price but YOU offered this deal to me and I took it and when the bill came due I paid ALL CASH just like I said I would.