Happens every day. Little things. Happens with bike monkeys, too.
I look for deals when I can, they are rare around here. I've pretty much given up.
My friend finds a Cannondale R800 in the landfill, missing a saddle and post, no rust, Shimano 105 STI group.
I lend him my extra tire levers and sell him some tubes/tires, a saddle and post. Off he goes. I have some tires to change.
I break both of my remaining levers trying to install some folding Michelins.
I switch to a metal motorcycle lever, putting holes in two tubes.