How does one come up with a value for a Kawika. I'm looking at a Kawika concert that has a Koa body and - I think - cedar top. It's exquisite and in nearly pristine condition. It has 12 frets to the body. How do you come up with a fair price for something like this. There aren't too many transactions that show up on ebay and if you took seriously the price at a site like Ukulele Friend then it would be worth something like $4500.