What rifle?
Problem with reloading is ... ok, nothing really, but you may just not be willing to dive into that, so it isn't on the table.
Problem with trading/selling is that if YOU don't want it, that's going to be a hard item to swap or sell for almost any value to anyone else. If you can't find ammo, how will they? You might get lucky and find a reloader who'll play with that cartridge, but it will be a pain for whomever ends up with it.
You absolutely COULD put a few hundred bux into it and have a new barrel installed in a cartridge you like. Your gunsmith can tell you what other cartridges will work with your action length, mag feed lips, and bolt face (or if you can swap bolt faces).