The Daguerreian Society has an auction every year during their symposium/conference. Online bidding is possible. Here is info about this year's auction. Note that they focus on mid-19th century items with many of the images in hard cases. But they also sell some modern photographs that are taken with older techniques. https://www.daguerreiansociety.org/auction/annual-benefit-auction/2019-benefit-auction/ And a liveauctioneers post for the same auction: https://www.liveauctioneers.com/auctioneer/5675/the-daguerreian-society/
