You can also keep an eye out at gunshows. I picked up a good PAC ORD Imbel FAL for $600. As far as I know, the only issues with Century FAL's were:
Receiver: Unibrow receivers were bad at feeding. However, if it feeds well, then the receivers are otherwise fine. The other big complaint with Hesse receivers was many were out-of-spec, but that was a problem with assembly. Once assembled, well, not a problem. Of course, the ejector block could be assembled badly, so there must be some care.
Gas Piston: Century's two-piece gas piston (I believe they were original gas pistons cut towards the front with a piece of straight stock welded into it, which was a cheap way to manufacture a "US" made piston, but that is just conjecture). The gas piston is crap and causes all sorts of trouble.
Beyond those two things, of course, is bad assembly. But the furnature, while not real pretty, is functional. Their fire control groups aren't great, either, but work.
If you get an Century built on an Imbel, then the receiver issue disappears (along with the ejector block problem). You will still have the crappy piston, but replacing that isn't too expensive. Another problem with them is parts count. Century often used the follower and floor plate on the magazine to meet 922r. The trouble is, most folks new to the FAL may not know this and add whatever magazine they get. Often times on the secondary market, the magazine is long divorced from the rifle. Therefore, the rifle is technically illegal.
Ah, well, better avoid them...
Ash