The AMT Automag II .22 Magnum. It's a classy gun, and I happen to somewhat own one. And I'm thin on content now, so I'll just type anything. I've run about 25 rounds through the gun, and I got it from my father a month ago, who put about 25 through it himself, so it's in pretty good condition. I'm really pleased with it, but it has a small issue with jamming. Some ammo jams in it, but .22 Winchester Magnum Rimfire runs through beautifully.
... This isn't going anywhere, really. I'm just talking about something important to me. No moral, no recommendation, really. If you find one, grab it, it's a great gun. Fairly cheap, pretty effective.