A quick search shows lots of vintage/ex-military “surplus”/parts. Microscopes and optics abound. There are lots of collectors and nerds who’d be happy to buy a pump or an encoder or whatnot (Chris Boden from YouTube, maybe even Alex from Technology Conmections - would be delighted.)

Plus, who doesn’t want a life size 6’4” terracotta warrior for their house to silently take guard? You call it landfill, I say it’s whimsical and fun. Would a Halloween mask that brings a lot of fun also be something you’d consider landfill suited?