I would be very careful about who you have do the appraisal. There is a group in my city that appraises and refurbishes Japanese swords. When I first heard of them, I figured they would be pretty good. However, a couple of years ago I read an interview with the guy in one of the Mags (probably Black Belt). From the interview, it seemed to me that he likes to give the impression that a sword is sort of mediocre valuable, make an offer to the owner to take it off his hands for say, $1000, when the real value may be more like $10,000. It was really weird to read this interview where he basically admitted to cheating people out of their antiques. So, just approach anyone with caution, especially if they make you an offer for your piece.