As an addition to Mr. Roundel's comments, note that Buffalo Brothers has two (2) 25th Anniversary editions for sale. The first is from George's personal collection and has his signature on the back; the second is further down the page and costs a fraction of the price of the first. I echo his thoughts on having 2 signed guitars out there. The 40 guitars registered in the
Registry don't contain a signed specimen.
For what it's worth, I bought my 25th Anniversary about a year ago on the Bay for a price below US$1K. I might just have been lucky there since I think BB's price is more than reasonable for that kind of tone monster.