I would call it 2 for 1...
You create a game that the contestant has the choice of choosing which car they want to play for. Rich explains the cars, but it is up to the player. The game is the same (2 different props that look the same and/or opposite colors.) The contestant chooses the car they want to bid on with the models holding numbers mixed up. There are five items brought out that the contestant can choose whether it is the right price, or the 2 for 1 price. If the contestant guesses right, the contestant wins any digit in the price of the car (on a 5 digit board, next to the car). If they miss any of the prizes, then they have to guess where the remaining digits go at the end to win both cars (one chance). If they guess all the 2 for 1 items, they win both cars... but if they miss 1, 2, 3.. etc. They have to guess where the remaining #'s go. Strategy, and Roger can line it up (both prices) any way he wants!