The value of an antique metal box varies significantly based on factors such as identity, age, condition and rarity. A 2015 listing of metal boxes on the Ruby Lane vintage and antique sales website has prices ranging from under $25 to over $5000.
In general, the value of antique items is strongly tied to the actual sales price of similar objects. An antique metal box in average condition, for example, is valued slightly lower than an similar object of superior quality. Often, the materials used to create an antique item also influence the value of it.
Price guides such as Kovels, as well as websites including eBay and Collect.com, deal frequently in antiques and are the source of many prices.