I sold a Keller restored MM in April of this year for 15k (went to a retailer, who I believe added 3k and sold it for 18k). I only kept it 3 months...wasn't really that impressed with the restoration or the way my example played. Chad is a super competent/nice guy and stands behind his companies work...I just think I got a dud. A problem with some of the restoration shops is demand has grown and like anything custom made, you need to get lucky with who actually does the work. Was also not happy with the reproduction PF...had obvious imperfections that should have been touched up.
Lesson learned: don't assume that because a pin is super expensive and restored by a "big name" restorer that it's flawless!