Have an opportunity to get a CETME for $350. Its a friend, he's not in a hurry to get rid of it and he's a cool guy, so if its a lemon he isn't gonna complain about taking it back, so there's 0 risk on that front.

Is it worth it? I've been wanting a semiauto .308 for a while, but not badly enough to drop the $1k+ on an AR-10. So, questions for the more experienced:

1. Is this a good deal?
2. Are CETME mags expensive/hard to find? I wouldn't want more than like 6, but if that means I'm dropping another $300 on the weapon I may as well go somewhere else I think.
3. What are my options for mounting optics?