My Seagull is certainly solid enough, which lines up with what Chris says in terms of age. It's a knob wind, not a crank, and it's all metal as far as I can tell. The lens itsn't outstanding, but it's agreeable. It could probably use a CLA now, but then again, so could I.
My experience and Les's may be atypical, so I certainly wouldn't advise anyone to ignore the accounts given by others in favour of mine. In any case, even for a working model, the $80 asking price mentioned in the original post is simply too high. There are better bets, and a Yashica with a good Yashinon is one of them.
The meter on my Yashica-12 doesn't work, but it seems to be due to a physical disconnect in the battery chamber. However, I've used a handheld meter for years, a Weston V that's as accurate now as when I bought it in the mid sixties, so I don't even notice the Yashica's dud one anyway.