To determine the value of a specific antique metal sign, get a free auction estimate from a dealer website such as ManifestAuctions.com, search for recent sales of the same sign on eBay.com or search an antique signs price guide, such as iGuide.com. For more general values of old metal signs, visit collectible shops, antique malls, and flea markets, and compare the prices of similar signs.
Many factors affect the prices of antique metal signs. Certain brands advertised, for example, Coca-Cola, Nehi, Edison, Studebaker and Rambler, are more popular than others, and may attract specialty collectors. The design of a sign, including the colors used, the shape of the sign and the level of detail, also make a sign more desirable, increasing its potential price. The size of a sign makes a difference in value, since collectors want a sign big enough to make an impact, but not so large it cannot be easily displayed. As with most collectibles, rarity, market demand and condition affect value.
Metal signs come in many different styles such as porcelain, tin and painted metal. These signs may hang over the exterior of a business, display by the curb or hang on an inside wall of a store.