R.I.P. Scout26
I've got it. I also have my Grandfather's Curta. He and Dad were both engineers.
A Curta is on my short list of "expensive things I have absolutely no use for, but would still love to own for some reason." Another mechanical calculator on that same list is a Norden bombsight.
A short ton of Curtas on sale on Fleabay right now, with very high reserves and the like. But I couldn't find a single with with a single bid on it. Lots of lookyloos, but that's about it.
That's the Catch-22. You want an expensive calculator, to help you compute large numbers, but since you don't have an expensive calculator to help you compute large numbers, you're unable to properly budget for one.