You don't see too many of these Formula wheels so they are hard to value, but a wheel like this that would be period correct in an early 911 has value. I've seen rare aftermarket wheels hit the $300 mark, but it's hard to say. That early hub is worth a decent amount on its own, too. Guys will pay nicely for an early crinkle finish hub.
If you are interested in selling, I'd be an interested buyer. Shoot me an email to
matt@unobtanium-inc.com , even if it's just for another opinion.
Thanks- Matt