That Italian Ferrari mandolin sounds beautiful. Here is an article that may have some information, if not prices. Also, there is one for sale on eBay right now (for another 14 hours), not very high right now (about $134 US) but you never know what will happen as the auction gets to the closing moments. Go to the home page and search on "Antique-Ferrari-Bowlback-Mandolin" to see this one.

SRS