Sure do, but I remember them from later in the '70s. There was also the Lemon Krate and Orange Krate...if my memory is still good after all these years.
Most of the kids I knew had stingrays, which were great for sitting on under street lights when hanging out at night with the guys. You would even see 15 and 16 year olds with them back then. I sometimes cobbled together a stingray as a kid, depending on what parts I could scrounge up. They weren't really good for anything more than short distances, and doing jumps. I usually, however, had drop bar road bikes and "English Racers". I used to do some serious long distance riding back then. Good thing your brother held onto his, since they seem to be getting (at least asking) small fortunes for them. One way to pay for retirement.