Greg, actually the most and best of Mark's collection was auctioned at Heritage just this (2013) spring and summer,
with many more highlights of his collection having been available in the Heritage auction of the week just past:
http://sports.ha.com/c/item.zx?saleNo=7085&lotNo=82006 (lots 82006 through 82042).
Mike, if you're referring to the sample of
National Pastime that sold on eBay in May 2005,
Mark wasn't the winner on that one. We know who was, but it's not up to us to say who (sure as heck wasn't us!).