These are "rebuilds" of the Spanish version of the FAL,
It was actually it was designed after WWII by a bunch of Ex-Nazis in Spain, named the CETME there, then when they came back to West Germany it became the HK G3. But yes, they are Spanish CETME rebuilds.
I wouldn't pay a cent over $500 for a Century CETME. Buy it for a plinker and only when you can get a decent price.
Century makes/rebuilds FALs as well but they will run a little higher (some moron on GB wants $1200 for his