Pawnbroker can conduct business in English. Accept Cash. Pawn loan is a huge part of City Diamond Exchange Nashville business, as well as buy, sell and trade, warranty. The most favorite things to buy and sell in City Diamond Exchange Nashville are: all types of jewelry, including rings, earings, chains, bracelets and coin collections, TV's, computers, smartphones, DSLR cameras, appliances, top brand tools like Hilti, Makita, Bosch, work radios, new and vintage game systems, contrlloers and accessories, musical instruments and equipment, stage light, hunting and fishing stuff, golf clubs, bikes, jerseys.