My folks bought everything from Sears & Roebuck back in the day; even the seat belts my Dad installed in the 1962 Ford Galaxy 500 that my folks had. Back then, cars didn't come with seat belts from the factory.
As for the transistor count in radios, I think that was a holdover from tube radios - the more tubes or transistors, the better they had to sound(!).
Regarding the survey, I had 20 out of 24. No AOL, except for the coasters, err, I mean the disks they used to mail out. No MySpace. No Atari, though I recall using a friend's Magnavox Odyssey...even older. Lastly, I didn't do the Columbia House thing; never had enough money back then.