I keep my old PC parts "just in case" I need a spare part to test for a failure in my current rig. IIRC I've still got a working GTX 1070, GTX 780, 2600k @4.6Ghz on a P8P67Pro board with 16Gb RAM, 2 Corsair PSU's (550w & 750w) and handful of early OCZ SSD's and generic brand HDD's etc.
At some point I should pass it all on to a "PC Parts" charity etc but I can't find one near where I live than seems like its not some kind of scam.