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

[kingrukus 10+ year member]

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:

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[UnderFire 10+ year member]

http://www.caraudio.com/forums/head-unit-classifieds/560062-rare-sq-hu-copper-chassis-rockford-fosgate-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.