Condition
Dented, scarred, pitted or bent silver items are usually worth less than items in pristine condition. Some allowance is made for the condition of antique silver. Spoons, forks and some heavy-wear items are expected to have slightly worn parts. However, badly presented items will sell for less. This also applies to pieces that have clearly been reworked or refurbished.
Maker
Silver items, particularly antique silver, usually have a hallmark that shows the manufacturer who produced the item. This is important when it comes to working out the value of silver. Some makers are more desirable than others. For example, in North America, Tiffany tends to be a name that attracts high bids at auction. Mass-produced Taxco silver from Mexico may reach lower prices.
Style and Location
Style and location play a part in the value of silver items. Distinctive and rare patterns may be attractive purchases for collectors. Buyers are also more likely to spend more on sterling silver style pieces. This is the highest grade of worked silver and is often marked by the digits "925" or the word "sterling" pressed into the metal. Location can refer to country or town of origin. Old English silver, for example, tends to be highly sought after. The symbol of a lion signifies English sterling silver. Check a hallmark guidebook such as Bradbury's Book of Hallmarks.
Age
The age of a piece is paramount when determining value. As a rule of thumb, the older the piece the more it's worth. Of course this doesn't apply in every case. However, silver items that are more than 100 years old are classed as antiques, which tend to be more sought after. Items from the 19th century and before are harder to find. This tends to push their price up. Age can be determined in part by checking the hallmark and maker's mark on the item.
Fashion
With all decorative arts and collecting, styles and makers go in and out of fashion. Something that's highly priced one year may fetch slightly less a few years after that. For example, in 2010 many plain styles and '50s and '60s designers such as Stuart Devlin and Gerald Benney are popular. However, in general an older piece in good condition with a recognizable maker's name will sell no matter what the current fashion.