Your prices are good, but you have to find someone local(ish) that needs the parts so you may not sell them right away. Shipping fenders isn't something anyone wants to do anymore.
When I sold the '74 fenders from my Duster I shipped them across the entire country via Greyhound. I don't exactly recall what they sold for but I was only asking $100 each, but I basically had to build crates to ship them. Crating and shipping them probably cost almost as much as the fenders and that was almost 10 years ago. Just wouldn't be worth it to ship that now.