There all crap...lol, well ones not but sorry someone had to say the punchline..one worders are always good although I'm not sure what use they would have beyond a kids site or some prank site. goodluck
I think you could find a taker for saucers.info somewhere. Maybe a UFO-junkie would want it.
As for your other names, no value as far as I can tell. I think sweetsewage.com is unregistered, if you're interested. Seems to go with your general theme