I would like to trade in 34 Playstation 2 games at EB Games or Game. How much would i get?

If you sell on ebay you count probably get like $100. At Gamestop/EB they will probably only give you like 50-75 only because the PS2 will be funny outdated by next year. This means, they will stop making games for the PS2, so if you sell it now, you definitely will make more than if you wait.