Hobbyists collect a wide variety of objects. In addition to United States and foreign coins, currency and postage stamps, other collectibles include postcards, matchbook covers, beer cans, sports trading cards, dolls, buttons, and glass bottles, to name just a few. The number and types of possible personal collections are virtually unlimited. It is difficult to determine the value of some collections or establish values on valuable single items, which make underwriters reluctant to insure such collections on a valued basis. However, it is easier to secure adequate coverage when recognized experts appraise individual items or entire collections. It is important that appraisals be kept current because the market for such items can change significantly in a single year. This explanation of insurance benefits is provided by Insurance Marketplace.