No offence but you have hardly been here and you are asking over $500.00 when nobody even knows you well yet.
Also how may MB's is it?
Has it ever been overclocked?
What brand is it?
Dose the company prove any kind of warranty?
If yes have you signed up for it yet?
If yes is it transferable?
Do you have pictures? I doubt someone will give you $550 if you can not even take a picture.
Do you provide any kind of shipping insurance?
Need I go on? Not to be a jurk, but when you ask for over $50 I think you should prove a little more information then "Good shape, Good condition".