47-55.1 What is junk?

[Livemeyer]

My old truck came partially disassembled with lots of parts in boxes. I'm sort of hanging on to a lot of stuff that I have no need for because I've replaced it with new aftermarket stuff. For instance, I find in the box the original single cylinder non-power assist brake master cylinder. It's completely dry and rusty and I'd never consider putting it back on the truck... but what if someone else needs some of this stuff??? I'm not trying to sell anything here, just basically having second thoughts as I hold boxes of rusty old parts over the trash bin...