That's a beautiful book at a great price, but is it important in the sense of Buk's career? There seems to be a glut of insanely cool Buk items available at the moment, some big ticket items have definitely shaken loose and there are some I'd own if I had the dough. But are most of them truly important in terms of his career? I'd say not really. They all feel like things that will all eventually show up again, and again.
Also, as Purple said, the interest in these things seems to be waning a bit.