1983 Radio Shack Catalog
Not a lot of people cared about TRS-80s by this time.  By 1983 the IBM PC was the microcomputer of choice, and it was in turn to be superseded by the Mac in 1984.In the heyday of the TRS-80, they looked like this: http://mew3.us/images/vintagecomputer/trs80m3.jpg