I mean: these are experts, they sell stuff valuated at millions of $, they must inspect what they sell. It's not about about security at first: it's more about

I mean: these are experts, they sell stuff valuated at millions of $, they must inspect what they sell. It's not about about security at first: it's more about if the thing is authentic, if the thing is in good shape, if it will not break during transport or display, how to store/hang it properly, ... After that, they must have been suspicious about the weight, the bottom hole, ... and must have done additional, more detailed checks, even a scanner to see what's inside. It's not like it was a simple piece of paper they had in hands, it's a million $ strange heavy thing. Anyway, it shows very bad about them if they didn't see what was "wrong" with this piece.