Pretty sure they are fraudulent transactions
. Probably drug dealers money laundering
You seem to surprised that people collect things. The lovely chap I sold my stuff to had a large collection of Voodoo cards in boxes and wanted to add mine and others to the collection.
Value is what price you place on an object, not what it is worth. To him, the card was valuable. To me in the past, it had been valuable but not longer. It was just sitting there under my desk, gathering dust. I got a couple of hundred quid which helped me upgrade my VR setup (which I no longer use as such).
You only have to check out LGR on YouTube and you will see there is a market for old hardware. People do like old PC related things these days. I wish I had kept more of my 80's hardware instead of "recycling" it.