How much can I get for my PSP?

I have a Limited Edition Ratchet and Clank PSP (Silver) I bought it with my birthday money a few years ago and it's in really good condition I've only played it no more than like 10 times. It came with a family guy disc and a ratchet and clank game. I also bought a case for it. I wanna sell it since I never play it. How much do you think I can get for it and where can I sell it?