It doesn't matter how many sites you put this on, you are never going to sell at that price! I'm sure you have realised this by now though. Being engineered is a definate bonus. Goodluck with the sale anyway.
Car would have cost about that to build up and engineer. It's common for it to cost a bit over $10,000 to engineer a V6 Gemini to street legal specifications. Resale however is normally a fair amount less, I've seen a few go for around $7,500 - $9,000 with engineers but none over that.