Do they get traffic? If so, monetize it by parking with a service or whip up a little site and stick some Adsense on. If they don't get traffic, then either get

Do they get traffic? If so, monetize it by parking with a service or whip up a little site and stick some Adsense on. If they don't get traffic, then either get rid of it or develop it. You can try selling them, but I'm not sure they're worth much.