Antiques businesses buy, sell and trade older objects valued for their age, craftsmanship, design, rarity or historical interest. Their stock can include furniture, clocks, ceramics, glassware, silver, jewellery, paintings, prints, books, maps, textiles and decorative pieces. Some specialise in a particular period, material or type of collectable, while others offer a varied selection. Items may be sold individually or as part of a collection, and their condition and provenance can affect how they are described and valued. Customers may also find services such as appraisals, help identifying an object, advice on its history, and assistance with buying or selling inherited or unwanted items. Some businesses arrange repairs or conservation, or can refer customers to suitable specialists. Antique dealers may source pieces to meet a customer's requirements, and some trade through auctions or offer valuations for insurance or probate purposes.