I save almost all of mine. Sprue come's in handy for scratch building funny car frames, roll cage's, ect. ect.
The chromed stuff becomes custom bumpers and grill's.
Also use sprue for paint stand's........
This is an H.O. scale work car/ water tender with homade sprue parts all over it. ( Some of the tools in the barrel, the ladder rungs and that "pile " of junk in the middle. )
Sorry. It's hard to see but the windshield has been made to open ( just like the real thing ) using spru for the frame.
I would show you more uses but I tend to go on and on and.......................