This pawn store can conduct business in English. Accept Cash. Pawn loan is a huge part of Long Island Diamond Buyers & Pawn business, as well as buy, sell and trade. The most favorite things to buy and sell in Long Island Diamond Buyers & Pawn are: jewelry, icluding broken jewelry, scrap, gold and silver, coins and watches, diamonds, 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.