I sell one by part of my collection of Casio computers from the 80's.
This is the series of casio fx-790p but there are quite different models.
All are programmable in Basic, some in CASL or Assembler.
Please refer to my website for more information.
https://casio.ledudu.com/pockets.asp?type=74&lg=eng
All are sold fully functionnal with box and manuals (1 or 2 depending on model).
Most of them where only sold in Japan.
I will combine shipping.
As these models have more than 30 years, I do not offer return policy (except within France).
Watch carrefully the photos and feel free to ask any questions.