Hi, i was looking to sell my Ibanez SR 500. I bought it about 2 years ago and its still in good condition. It looks brand new. It is missing one of the knobs. I bought it for around 500 or 550. I also bought a hardshell case with it. Where can i sell the bass guitar and the case to get as much money as possible? and will guitar center give me around what i paid for the bass guitar since it looks brand new?