: : Anyone know what these guitars are worth?// I would be interested to know the serial number on your F-20 because I didn’t think they made them in 1955 (but I could be wrong!) If it’s a mid-late 50,s F-20, in great shape and plays well, you could probably ask anywhere from $1000-$1200. Still, it’s what the market will bear and sometimes it’s lower than that. I am a huge fan of the Guild F-20. I have 2 and the student model (M-20). Good luck and if you want to email me the serial number I’ll give you an exact year.