kami, while I do understand you feel that you got screwed, I really don't see it that way. The pics in the auction clearly showed a VERY nice looking system, but was clearly not new. If you aren't willing to keep it, hell, just throw it on eBay at a true auction and not some BIN price. We all get burned from time to time, so chin up and move on.
You stated that you aren't exactly poor, well that's great.
So, go get a digital cam man. They arent that high anymore, hell they are actually kinda cheap now. Take some nice pics of the system, and post em. While I am sure the Duo will sell, I am positive you will lose money on it. So, basically either eat it, or let it go to get some of your money back.
Unfortunately, if you try to let it go for more than you paid for it, or even close to it, then it won't be in your favor in the forums. It's how it is. We basically let things go here for decent prices, and even given away sometimes. That's the purpose of having your forum pals.
You paid a little more than you should have for that Duo, soo....you options are kinda limited here, aside from just keeping it.