About 2 months ago I was contacted by somebody in the UK who is a big Bowie autograph collector, specifically to lend him my Bowie example files - I have also shared these privately with other members on this site.
I was happy to help out because his main reason for the site was to try and drive down the number of pathetic fakes that are being offered on eBay, ioffer and traditional auction houses.
...for which I am very grateful, and I wish to return the compliment to MarkG. I am quite happy to see several "Bowie's" among the exemplars which I have collected myself, and others I plucked out of the wild and sold on to good homes here and elsewhere. This is a great site Mark linked above, certainly worth looking at, and noting for future reference. This will certainly help against the wave of (increasingly "good"/bizarre) forgeries being accepted by so many. I recommend it.