I'm sure they would not have been less than £850 in whatever currency it was sold in back then, inflation adjusted. But the justification was much better than being a fidget toy.
The problem is that if I bought one now, it would simply be a toy and nothing else. That's just a bit more than I'm willing to spend.
I could probably get one of those cash registers to play with for not a ton of money, but my house isn't huge and it's hard to justify the space.