I could actually see a 5100 selling for 6K although that'd be the upper limit. There is very few, and I've never dreamed of having one becasue I'd expect costs to be in the thousands. They make fun of the screen, which I thought was rather pathetic, would've been better to mention the potentials costs if it doesn't operate. It's not about how useful it is.
I think the rest would require someone with so much money that they don't notice the price. I'm sure a few sell provided the audience is big enough. Nice to see the overpriced stuff getting a bit of media attention, because a lot of it is scam-work, hopefully deter a few potential buyers and get them to do a little more research
MS DOS 3.3 for 4 grand was another one recently.