I can only speak from my experience. When I was about $18k into it, I threw it up on Craig's list and eBay countless times. I had one guy offer me $10k, but I turned him down. $62k later, $10k was a good offer.
I finally decided, "nobody is going to buy an unfinished car", so I built it and don't think of selling it now.
I know Craig's List will get you plenty of offers to swap corvettes for it: I quit counting.
Throw it up on something and see what you get. Good Luck!