Needing a bistable to operate on a supply voltage from
3 to 8 volts (depending upon the state of discharge of the battery in my R/C model), and not having any suitable CMOS to hand, I fashioned one in the DTL style from the junk box.
Which led me to muse ... when the bulk of electronics mass-production has moved to miniature surface mount components, will the junk boxes held by enthusiastic amateurs, with their myriad of wire-ended components prove to be the gold mine that funds their retirement pensions?
(I've probably got 5000 NPN small-signal BJTs that I'll never get around to using!)