Three prong centre caps

[Rocket]

I have two Porsche wheel caps with prongs on the rear, one fits a smaller wheel than the other.
Question, im selling, what are they worth, both genuine, both in good condition.
Im thinking these are early, you can get repro now but would like to sell to someone who wants a genuine cap....

Thanks

[Silver911SC]

I paid £20 for one on eBay recently and think there is a listing for 3 or 4 of them for £80
Plus postage. But top condition seem to fetch more I think.