I have a few in my basement for my FULLY FUNCTIONAL! :) IBM 5120. My Baby. Pic stolen from Wikipedia because I'm too lazy to go upstairs and take a pic. They were $2–$3 each. Radio Shack was stupid high at about $4.50 each. Microcenter had them for a couple bucks. read more
The first commercial floppy disks, developed in the late 1960s, were 8 inches (200 mm) in diameter; they became commercially available in 1971 as a component of IBM products and then were sold separately beginning in 1972 by Memorex and others. read more