TRS-80 perhaps? I used one in college doing BASIC programming never wanted to work on computers after that. Could be collectible have seen them in museums.

Model III
TRS-80 Model III

In July 1980 Tandy released the Model III. The improvements of the Model III over the Model I included built-in lower case, a better keyboard, 1500-baud cassette interface, and a faster (2.03 MHz) Z-80 processor. With the introduction of the Model III, Model I production was discontinued as it did not comply with new FCC regulations as of 1 January 1981 regarding electromagnetic interference.[10][15][18] The Model I radiated so much interference that while playing games an AM radio placed next to the computer could be used to provide sounds.[19]

TRS-80 - Wikipedia, the free encyclopedia