That is not how BAT works. The sale is final, no further negotiations are possible. If buyer flakes on sale he/she is charged a percentage penalty on the credit card BAT has on file - and they are banned from BAT. If the car turns out to be not as described in the listing, BAT can/might cancel the sale. But the buyer cannot haggle on the price when they go scoop the car. It’s your responsibility to evaluate the car in full before you bid.