I wrote about the HP-10:
Especially given how much money I had to pay for them;
as HPs go, second
only to my HP-01 watch. I'm keeping them in a safe place!
Just to make sure that no one got the wrong idea, I have many HP products
on which I've spent more than the $500 for the HP-01. Such as the
HP E2310A LogicDart, the E3631A power supply, and the 1631D logic analyzer/
digitizing oscilliscope.
I meant that I've never spent more than $500 on any HP calculator other
than the HP-01, and the only ones I've spent more than $400 on were the
HP-10, the HP-10C, and the HP-19C. I'm starting to think that I might have
to spend more than that for an HP-81, HP-95C, HP-9100, or HP-9805.