How do I find the value of my guitar?
Look for a serial number.
On an electric guitar, you'll typically find the serial number on the back of the guitar body or headstock. The serial number of an acoustic guitar may be on the back or on the label in the sound hole. The guitar's serial number also may give you a clue to its value.
Can you look up a guitar by serial number?
Checking a guitar's serial number is a good and easy way to validate a guitar. You can look up a serial number either in Gruhn's Guide or run the number in the manufacturer's database.