Dirt cheap and at prices that I want them to be or GTFO!

Seriously? We've done this 'argument' more than a few times. Just because they've got a price up, doesn't mean you can't offer less for it. Worst that will happen is that they'll go to their videogame store owner forums and bitch that some customer wanted to ONLY spend 5 bucks on a game that they sell for 15 all day long.