For sale is a 2005 Gibson Master Model F-5 Fern Mandolin Danny Roberts Signed with a non-original case. This mandolin is in excellent condition and in perfect working order. There are some light scratches and that's it. Overall, I would rate the condition a solid 9.5 out of 10. There are no cracks, repairs, or major issues. The neck is straight with no issues. The original frets are in excellent condition with no wear. The case works great.