If you are interested in Imsai, you can buy
a new one from the legacy manufacturer:

http://www.imsai.net/

They are remanufacturing the original, with a
more modern Z-80 instruction controller card, and
manufacturing a look alike with standard PC guts.

-Chuck

wrote:
Looking for altair and imsai computers for a school tour.

email
can pick up local to connecticut.