usually half of what they sell them at the store for. So if i sold them pokemon ruby I'd get bout 7 bucks.
Probably not much these days. Which sucks, because I could make a fortune on games I no longer play. :v
I'm a supporter of the eBay crowd...Gamestop will rip you off hardcore. I sold my old games on eBay for almost $5 more than what Gamestop was selling them for, and three times as much than what they wanted to give me for them.