There are several price guides available for vintage guitars. Two of the most popular ones are the "Blue Book of Guitar Values" and "The Official Vintage Guitar Magazine Price Guide."
The "Blue Book of Guitar Values" offers listings in not only a physical book form, but also via a CD-ROM and an online subscription. As of 2015, online subscriptions offer a length of use from one year to three years, and can include specific types and styles of guitars or an all-inclusive subscription, which lists everything. "The Official Vintage Guitar Magazine Price Guide" can be ordered in a print copy and individuals do not have to subscribe to Guitar Magazine in order to purchase it.