As others have stated recently values are not typically what this board is for.
If you want to get an idea of values for any kind of glass the best way is to watch auctions, eBay, Selman's past auction catalogues etc.
If you want to learn about your paperweights this is a perfect place to ask questions about id's, makers, age etc.
eBay completed auctions is the better place to get an idea of values if you plan to sell online.
I'd also like to make an ammendment to the post above - please don't take my list of common Murano features to mean
any paperweight with a flat polished bottom, high dome etc. is Murano, many are not.
An id is often based on a number of factors, where experience plays a great part.