The last official production run was the 15c Limited Edition (ARM7-based, similar to the refreshed 12c around the time) a little over a decade ago. This variant was special enough that it shipped with a CD containing the official PC emulator.
I managed to swoop two of them back then while a broke ass uni student (sold out quick). Ended up reselling one just to make ends meet before graduating, but kept the other just in case my 35s went tits up; I still use that 35s regularly at the office, but CalcTastic[1] makes a very compelling replacement mobile app.
> Is there actually any market for these calculators?
Who are we kidding? Between engineering and finance types, RPN diehards are a dying breed IMHO. Even if a new RPN calculator were to get NCEES approval[2] for use in the FE/PE exams, in practice, very good RPN apps on mobile abound after formalities are out of the way.
[1] https://play.google.com/store/apps/details?id=com.shaytastic...