Tec-22, terrible pistol, refused to feed from any magazines but stock Ruger 10/22 mags, would still jam ever third round. Looked great, shot like a shotgun. I forget what I got for it when I sold it, but it was more than it was worth.
Century Arms built CETME - I got ONE magazine through it and it fell apart. Century said the warranty expired while the gun was sitting on the distributor's shelves. Found a tinkerer who wanted to try to fix it, almost made my money back.