Look at his other Buff listings. Most are Chinese fakes, too. I have little doubt that the "estate set" the seller referenced was a complete fake Buff set in a fake Whitman album.
Back when my wife and I did shows, we regularly had people try to sell these complete counterfeit sets of Buffs, IHCs, and type coins. Some of the people genuinely believed they had purchased real coins, and a few paid quite a bit for them.
This garbage won't stop until the online auctions are held liable.