Dimensions would help a bit, as the larger the piece generally the more valuable. However, this piece is going to be difficult to value for a few reasons. First, it is of indeterminate maker and age. This type of "traditional" Murano glass has been made since about the 1930s until today. Without knowing when it was made, it will be difficult to astertain true value, as the earlier the piece the more valuable. Second, the sticker is a generic import sticker. Without knowing the maker it is very hard to fix a price. Third, it appears to be damaged (one of the feet looks to have been broken off), which will greatly reduce its value.
That said, its value will probably be as a decorative rather than collectors item, and dependant on how much a particular client likes it.