https://www.ebay.com/itm/Hewlett-Packard-HP-100LX-Palmtop-PC-with-CF-
card-PCMCIA-adaptor-instructions/392120231070
It's $30 more than your android device -- I don't know if that falls
into the category of "ridiculously expensive" or not. I see them sell
between $50 and $125 fairly regularly.
I was thinking more of the HP200LX price point when I made my comment. However, I would
say that is still too expensive. You still need the serial adapter which usually adds at
least another $30 to the cost and for what? You get an old device with no support for
modern HW and limited ability to run SW. Now I am not bashing the HP LX series. They are
great pocket DOS machines, which is all you need for a simple VT100 terminal app, so they
will get the job done. However, for possibly less money, an android tablet gives you
faster HW, modern networking (wifi), a better screen, more storage, and access to much
more SW.
-Ali
p.s. The caveat is of course if you get something like the Gemini. That looks like a very
nice machine but at 599 British pounds I rather get a Sony UX series and have a real PC or
the HP LX200. The key, at least for me, is finding a no name Android tablet w/ the basics
that runs Android 7 or above at that $50 to $75 price point.