I had long talks with the two people who seemed to be running the Art Auctions on the Magic this week.
Most of the Disney items they have there I would not touch with a ten foot pole.
If I were into Pooh those are legitimate items. They have original production cels framed with the actual drawings. As a prior poster said, these are actual one-of-a-kind production cels.
With the exception of Don "Ducky" Williams, I am not familiar with the names of any of the artists who have done their Disney artwork. They do have some original artwork, but mostly they have reproductions.
They did have some small Sorcerer Mickeys which appeared to be cels. However, I was told that rather than the lines being either hand-drawn or xerographic, the lines were done from a lithograph and the coloring was "water colors". I asked specifically about the paint used; if it was gouache (which traditionally has been used for animation production cels) and was told it was water colors.
They appear to not be liars, but in my opinion they are intellectually dishonest. It appears that they have obtained lithograph stones and etchings plates of artists who are no longer alive, and have made additional, unnumbered copies of these works and are truthfully stating the works are by the specified artists, but you do not get the statement that the copies were done by the artist and obviously there is no signature.
And then they charge the 15% "buyer's premium". In a "normal" auction, where the auctioneer is performing a service for a client, the buyer's preimum and/or seller's premium is how the auctioneer gets paid. In the case of this company, they own the artworks which they are then auctioning, so they are making their profit on the sale of the artwork and then adding onto that profit.