I think this might be because once you have a tool, you either use it forever or until it breaks, and don't sell it in a good enough condition that it would be

I think this might be because once you have a tool, you either use it forever or until it breaks, and don't sell it in a good enough condition that it would be worth anything. My dad's circular saw, which he found in the trash 40 years ago, will probably last the rest of his life and all of my life. Used tools are dirty, oily, and heavy. That's why my shop is outfitted with a lot of estate sale finds. Old people croak, and their next of kin don't want to move a half ton of steel (even to the thrift shop, who also doesn't want to move them around their store), so it ends up in the hands of people like me for near scrap prices.