I've consigned 4 of my physical Bitcoins from my collection for auction at Stack's Bowers. I bought two of them directly from Mike Caldwell back in 2013 right before FinCen shut down his loaded coins business. I can't believe that was 10+ years ago!

https://auctions.stacksbowers.com/auctions/3-18DWT2/spring-2024-auction-session-9-physical-cryptocurrency-part-1-lots-8001-8137?limit=36&coin_grading_service=1-11DOL&coin_grade=1-11DL5+1-11DO4