If it's overlarge, slightly unbalanced, has an unpolished base, general lack of finesse in the construction and design, I would think twice (at least) before I bought it. If it's labelled Murano by the seller, be sure you know it is. Don't rely on ebay for attributions. If you hope to make a profit it from it, be pretty sure you know what it is before you buy it. otherwise buy it to enjoy. Study books and reliable websites.
I can't see any gold, but what I expect you can see is copper aventurine. This is used in both Chinese and Italian glass, but I have yet to see real gold in Chinese glass, though it is common as a fine powder or foil in Italian glass.