what are these wheels worth?

IMO, you can ask $500, but you'll be waiting a long time to get it! I've bought and sold dozens of sets of these, and I typically deal them in the $200-300 range with OK rubber on them! Yes, that's with the center caps and trim rings! I just sold the set that was on Sunfish to a guy for $300, all blasted and repainted with nice sombrero caps and trim rings, and decent BF Goodrich tires! Any more than the $300 would've killed the deal as they're just not worth it!

Good luck with the sale!! Geof