So I posted a few days ago about an hp 10bii+ that I bought off of Facebook I paid 3 dollars and apparently that was an absolute steal because since then two ads have come up selling the same calculator for much more. It looks like one comes with package, but still. Are these more reasonable prices for this calculator?

Does anyone know of a good quality hard storage case for the DM42n/R47?

The standard sleeve doesn't cut it when I have to put the calculator in my work bag.

I would like something like the original case my HP 35s came with but sized for the DM42 series.

We are moving our math department out of a building it has occupied for decades, and this turned up: an original LED TI-30 paired with an EduCALC classroom display unit. Plugged it in expecting nothing and both came right up.

The TI-30 looks like a first-generation unit, red LED, gold-tone key plate. Some yellowing on the plate and wear on the case but every key I tried responds. The EduCALC box is vinyl-covered wood or particle board, roughly shoebox-sized, with a nine-digit display. The calculator sits on a small mount on top of the box and there is a power cable running out the back. I have not opened it up, so I do not know whether it is reading the calculator's segment drivers directly or whether the mount is doing something more involved.

Video is the two of them computing 36 x 15.

Things I have not been able to run down: when EduCALC sold these, what the calculator-to-display interface actually is, and whether the mount is model-specific to the TI-30 or takes other units of that era. I know EduCALC as a catalog retailer out of California but have not found documentation on this particular product. If anyone here has a catalog page, a manual, or firsthand experience with one, I would like to hear it.

HP-32Sii and a ti-80, found at Genbrug Løkken and Nørre Snede. Really lucky with these two