IMHO, if he was serious about selling it, he'd be
auctioning it through a
"proper" auction house (ala Christies), and be looking for $100K minimum.
It is, after all, possibly the oldest surviving large electronic computer
on the planet...
Possibly ... but doesn't the Science Museum (London) have an ICL 1900 system
squirrelled-away in its warehouse?
(But I bet it doesn't have the necessary software - and if it doesn't do
something soon the relevant expertise will also be missing)
Andy