I was fairly sure I spotted some Makora amongst the xmas decorations.

(but... we're not supposed to say things about live auctions or do anything to damage reputations or do anything against businesses' "interests"...)
but what about the rights of buyers? "beware" is all that can be offered?
We might be on dodgy ground here.

It's hard to tell now, when profit is deemed more important than honesty or integrity.
Murano glass does come in various degrees of quality itself, from the very top stuff to small mundane things for tourists (although I think a lot of those are imported from China, these days. I've even heard a bit of China has been renamed Murano so it can be used as the origin. I do not know if that is true.)