Highly probable that it's an Afors, not Murano. I'm not too up on Afors prices, but I suspect that it depends very much on the designer of the piece. It's likely to be higher if designed by Ernest Gordon or Bertil Vallien, who designed for Afors before it became part of the Kosta Boda group. Usually the designer would have his name or initials on a piece he or she designed for Afors.
It's a nice piece. I collect both Scandinavian and Murano, and I wouldn't be at all disappointed that this isn't Murano, unless you paid a very high price for it.
Hope this helps a little.
David