If you list em I or some other forumers can give you an estimate, I dont work at GS but I have a good idea of how they roll. If you want a guaranteed price, youd have to go up there yourself and ask them to price check em.
Yeah. If you want to trade, I reccomend getting their power up rewards card. 10% off all used games and 10% extra on trade ins, so here it almost pays for itself. I also reccomend doing it for a trade in bonus. Right now they have 30% extra trade in bonus
on just about all big late 2011/early 2012. If you have card, you get extra 10%.