i take just about everything off them, i use most of the surface mt resistors quite a bit, the 1206 ones fit just about perfect between the .100" holes on those
perf boards, you also have a thirmister or two on some of them, and most of the brds i have had several invertors on them, also the jumpers come in handy, i just
started one day and got any numbers off the componants and looked for the data sheets just to see if i had a use for them, it also helped me to learn what type
of componant it was.."sot23,...."