Sell Your Gear If you have an instrument you're looking to sell, you can make a listing on Reverb by going to our sell page via this link. We base our price estimates on real-world transactions and record them in our entries so you can see what your instrument has sold for in the past. How much is my gear worth? Check out our free price guide which contains thousands of instruments and pieces of gear. How old is my gear? Where did it come from? If you don't see the brand you're looking for, let us know what you're looking for in the comments at the bottom. Use our dating guides below to figure out when your instrument was made and where it came from. Most gear has a serial number, either printed on a label inside it or stamped into the headstock or neck plate. Whether you inherited your instrument or bought it at a swap meet, you're probably curious about its provenance.