What is the...

I think it's a bit more than half the price you payed.

E.g, if you bought Pro which is like £210 - you'd get around £115 or probley less I dunno.

What is the current trade-in value of a premium xbox 360, opened, in great condition, at gamestop, ebgames, or game crazy? xpointblank7

why don't you call them. it probably would have been quicker than asking the question on a gaming forum.