[quote name='urzishra14']never trade in games unless there is a very very good deal going on.[/QUOTE]
Exactly. I took in 37 games today to see how much I would get. I have seen trade in deals pretty much every time I go in for the past 6 months (to either a EB or GameStop...although I don't go in as much as I used to). I was HOPING they'd have something like "trade 2 or 3 and get an extra $10" or at least the "Trade 4+ and get an extra 40% in credit" deal. They had neither. I was told that for all 37 games I'd get about $200. I said no because with the 40% extra deal I would have received a bonus $80 and with the "Trade 3 get an extra $10" I would have received another $120. If it was an EB and they had the "Trade 2 get an extra $10" I would have received an extra $180.
So yes, don't trade in unless there's an awesome deal. My trade ins would have been anywhere from a free game or two all the way up to a free DS (or a bigass chunk off of a PSP, which was what I was going for).