Not surprising - I'm sure there are collectors of Microsoft memorabilia somewhere.

Early versions of MSDOS and Windows in the original box are becoming collectible. It's only going to harder to collect them on the cheap in the future. I'd grab some while I still can.

His link originally went to an auction for a demo by BITS.

BITS was marginally (in)famous in the demoscene for churning out numerous 5-minute demos and selling them on eBay, and for being batshit insane. Frankly, I'm surprised he's still around.