Accept Cash. The most favorite things to buy and sell in Cash 'n A Flash are: diamond rings and other jewelry, luxury and high-end watches, 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.