We normally can't say much about value (it's very subjective) and the idea of this forum is not to get a valuation, though we do welcome identification questions.
In this particular case however I can tell you that I saw one go on Ebay in the last two weeks for around 300 euro. Which means it's not unique, and that is the price level that people will be expecting to pay.
I don't know anything about Murano glass though, so I can't confirm the ID (but others may be able to help out there).
Astrid