Here are a couple of screenshots of how it works. You can select a quantity, and then it gives you different tiers. It gives you an approximate discount percentage, and shows on the seat map which sections your tickets could possibly be in.
Next you enter in a price, again it gives you an idea how how likely that is to be accepted. I made the comparison to Priceline, and it is true, you have to put in payment details prior to making an official offer. But if you are going to the game, what a great way to save money on tickets! I have a feeling this site is going to get big.
Click here to check out tickets on Score Big.