
Hi and welcome to the board!
This is rather an exceptional thing, I know nothing about Murano, but even I can see this is special.

I'm afraid we do not really tend to discuss values - they are far too subjective. Something is only worth what somebody is willing to pay for it, in that place, at that time.
Having said that, putting this into an auction with a world-wide audience, would lead to it finding its own value.
Folk will be fighting for it.