Rockford Fosgate RFX-9220 copper chassis - what is she worth?

I have a Rockford Fosgate RFX-9220 copper chassis head unit thats in good condition that I am looking to sell. This thing costed me a lot back in the day. Anyone know what I could sell it for now?


Here is a pic:
http://i6.photobucket.com/albums/y24...rfx9220_03.jpg

http://www.caraudio.com/forums/head-...-rfx9220g.html

Here's a link to one That's for sale here right now, price is hard to judge on rare items, but judging from the ad it's worth quite a bit.