I have onlyused GAME for trade in's in the UK (mainly PS2 games) and i pretty much only used the money to get pre owned games. Trade in also depends on how many of the game you are trading they already have - Z-TP is a game a lot of players have completed now so if they are all trading it in the value goes down 
If you have games that wil sit and never get played anymore then you are better off selling them to get some cash back! Either Ebay (which can be a little up n down) or trade in (less value but a value none the less!)
just my insight
Es
If you have games that wil sit and never get played anymore then you are better off selling them to get some cash back! Either Ebay (which can be a little up n down) or trade in (less value but a value none the less!)
just my insight
Es