Hi Lenore,
Well, that is what I do sometimes when I am not sure about a piece. I will just buy it for a price I can live with, if it turns out not to be Murano, or not the maker I thought it was then I can scrap it. I have received some awful pieces in the past that I thought were Italian but because of bad photos I thought it was worth a chance. But then again, I have bought some exeptional pieces by just taking a gamble on them. I would say go for it, if you think its worth it in the end!
Javier