Oh... of course it depends on the collector, but I figure it is in the vicinity of $1,500 or so.
Try the flooding of Lake Missoula and creation of the Columbia Gorge as one reason the Columbia wooly mamoth may have been wiped out. That was one epic (actually several) flood. Sixty MPH, and 200+ feet above current river levels. Boulders so large they were carried to the Oregon Coast Range.
It sounds like a pretty sweet knife.