I sell reloading stuff on E-bay all the time. You aren't supposed to be able to sell primers, powder or live ammo but I still see it from time to time. If the E-bay staff notices, they will close the auction and send the seller a nasty-gram.
You can buy and sell all sorts of reloading equipment, brass, bullets, gun parts (not receivers), etc.
Just check the feedback for the seller and you should be okay.