John, I sold a rear fender to a fellow about 4 years ago on eBay and he paid $355 for it and was happy to get it. After saying that, I would suggest that timing is everything. I would hold off trying to sell them until this fall, when many folks are looking to spiffy up their cars for the coming driving season. On the other hand you can put them on eBay with a reserve and see what happens.
Good luck with whatever you decide to do, Tinkerman