The online community of knife collectors, A Knife Family Forged in Steel
Upon closer inspection, this KY dealer, selling on Ebay, clearly states, in fine print at the end, that all these knives have some main blade play. I worked in industrial manufacturing in one of my lives, and I am now convinced that these knives were samples, from Bear's R&D. I wouldn't buy one at any price, since I wouldn't want to use a defective tool.
Later in the week, he offered another BSA, and the BSA shield logo was facing the wrong direction. He has a few of these as well. They might be a good buy.