Avoid Century rebuilds like the plague - had a Century CETME, would not feed from any magazine, bolt had been ground so not only did it need a new bolt but new rollers too, and at 50 yards got a seven,(7) inch group. The original Special Weapons stainless steel reciever CETMEs are supposedly better, but for about $200 more than the cheap CETME you can get a nice OPhio Rapid Fire FAL. If you really want the CETME, you will PROBABLY spend some money and time "tweaking" it to work right. I say prbably because I know of two people who have Century reworks who claim they work perfectly. Caveat emptor.
BTW, TAPCO has bunchs of CETME parts/extras cheap, as well.
GunsN stuff has both the stamped Century reciever CETMEs and the stainless reciever ones.....