HP 71B RAM: has anybody big ones to sell?

[Dave Frederickson]

Vintage memory modules are expensive. A FRAM71 module is a much better investment as it also adds the capability to add ROM modules. Other things to consider are an HP-IL module, a PIL-Box, and other HP-IL peripherals.

BTW, you can add 384k (for a total of 400k) of RAM to a 71B with an HP-IL adapter.
https://www.hpmuseum.org/forum/thread-4551.html

Dave