In today's world, the rear fenders are worth his asking price, everything else is gravy. The factory ones were stamped with thicker metal than aftermarket, they take stones thrown from the rear tires better and don't crack as bad.
Step sides are tough to build nice, the panels are all single thickness steel that shows every ding and dent. Most were actually used as a pick up truck at some point so they all have them. On the next one I do, I will just order everything new and sell the old bed to somebody else who wants to fight the war. By the time you sandblast, epoxy prime it, take care of the dings and such, it's more cost effective and the results are nicer.