It depends on the games.
about 5-10 dollars
I bought two Ps2 controllers at Game Stop for 10 bucks each!
10 bucks at mine
$200-$300 20*10 = 200 20*15 = 300
About 15 or 10
this is oddly put, but you can sell as much as you want, the price differs with the game, and if you have an edge card you get 10% more from a trade in, and 10 % less on a game in the store.
about $10-$25
DSI chargers can cost 10$ at game stop
Probably 10 to 30 dollars.
Maybe $10
GameStop and play and trade will give basicly the same amount per game, depending on condition and value of the game, but Game-Stop has a membership program (about $15 a year) and you will get 10% more for your games, plus 10% off used games, a 1 year subscription to game informer magizine, and points to save from every purches and trade in to get cool stuff!!!
You get an undervalued price somewhere between $1-$10 depending on the game type (mmo, drving, shooter), quality, and how recently it was released. You make more money selling it on ebay or craigslist.