I ran a retail tool sales and hardware store out of my warehouse from 1981 until 1998. When I decided to shut down the tool part, I sold most of it out. In order to make room, and not wanting to give the stuff away for pennies on the dollar, I put what was left in cabinets, then eventually piled other stuff on top.
I have several thousand dollars worth of brand new in the box adjustable wrenches, socket sets, and pneumatic tools that I have basically "forgotten about". I stumble across them from time to time, but soon forget.
Heck, I even have a 3 piece humongous rollaway tool box that stands taller than me, still in the cardboard boxes on the top of the pallet rack.
I don't doubt that there are others who opted to keep pricey things when they closed their business, as opposed to dumping them on the market.