Typhoon Collectors. A lot of them on Ebay, and now all sites, always searching. But, the items need to be in great condition, esp. golf clubs. Only a certain few brands are collectible, though.
The person with those Eye2 BC irons should use Ebay. Bidding only, with a reserve set. That will let him know pricing, and he can always sell them to highest bidder, even if reserve is not met. Just setting an 'asking' price, esp. when it is high, will make for few sales. He may well get more than that through bids. Esp. if that 1 set finishes off someone's collection, at that point in time.