Appraisal of my ZOTAC gtx 670 AMP! Edition GPU card?

[adampcpower]

I have a ZOTAC gtx 670 AMP! Edition GPU card and i was wondering how much its worth so i can make an asking price. I barely see any for sale second hand so i cant gauge very well. Are they rare or something? What are they worth if mine is very good condition?
Thanks

 

[Amit Parmar]

About $290 will get people asking for it. It is about $30 cheaper than the retail.