I thought this one was worth sharing. There has been a lot of talk about this old beast here of late, not to mention Craigslist. Here's a good example.
I'd say its a good deal if it's in good shape and working condition. F3s are getting amazingly common on the used market, though, and with surplus comes great deals. If this one isn't in pretty good shape, pass on it and wait for a really nice one. 35mm cameras are only getting cheaper.