I've been calling my piece simply Murano, but it came from Design & Arts, usually reliable, who sold it as Campanella. In other words, I am not totally convinced, perhaps because, to me, it's from one of three roughly equally proficient Murano companies who used the same canes.
It's an interesting discussion about how to distinguish between the companies, though.
Price? Very hard to say right now as the Murano market seems very low for pieces like this. I paid well under $100 for this piece, which is smaller than your piece. Several hundred dollars seems very unlikely. The start of a collection? What a great idea. But then I'm notorious for being very reluctant to sell anything.
David