Dating schwinn varsity
Bicycles are wonderfully simple, eloquent and efficient machines.
A few of the bikes were purchased by me, or for me, new, including the brown 1971 Schwinn Super Sport, the Trek 750, the Univega 700FS, and the Trek 850 (for one of my sons).
BMX bikes are used for dirt racing, jumps and tricks.
(See Schwinn Timeline.) Schwinn today is part of Pacific Cycle.
While Schwinn often had a reputation for building heavy bikes for kids, the Paramount line had a reputation for finely crafted, relatively light road bikes.
The rest have been acquired used, primarily at garage sales.
Bike technology, of course, changes, but nowhere near as fast as computer technology.