1971 FG-75

That's a good price IF it's playable.  Most of these old FG's have high action and need a neck reset.  I've heard many of them were very close to needing a neck reset when they left the factory!

The FG-75 is a VERY common model.  While it's a popular Red label, I do not consider it to be a desirable model because of the heavy bracing and boxy sound.  The Black label FG-75-1, that replaced it, is X braced with MUCH improved tone!

I don't think you'd get much more than $100 for it locally, maybe $200 on Reverb.  There are SO MANY out there, unless it has low action there's not much desirability for it.