PSP + Games + Video + Charger?

Approximately how much could I sell my psp for? I have Tekken dark resurrection, wipe out pure, socom us navy seals fireteam bravo, MLB 06 the show, hot shots golf open tee, burnout legend, house of flying daggers, napoleon dynamite, and triple x. In addition to that I have charlies angels, GTA Liberty city, and Twisted metal, but they don't have cases. Also the psp has a 512 MB card and is running on version 5.02. How much could I sell this for on Ebay or at game stop? Charger is also included. Thanks for your help!