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Aaron M.Max, a Baker "Fan For a Fan" was offered a few times by the same seller on E-Bay in June and July and I don't think it ever sold (he had it listed at a BIN for $6,000).
I ended up buying his 1914 Braves Royals Rooters pinback for a "Best Offer", and would have loved to buy the Baker fan as well, but it was out of my price range (though I don't think it was unfairly priced -- I think the Mastro example sold for about $5,000 when you factor in the buyer's premium). As far as I know those are the only two Bakers ever offered publicly for sale.
Anyway, the seller's username is joejo20 if you want to contact him and see if it's still available.
Good luck!