I discovered that there's an ewaste bin near my school.
Who throws away a working pair of headphones, a working CD player, a working portable USB-C vacuum cleaner, and a seemingly unopened USB-A to B cable with the price tag still on it?
Someone else found a mini-ITX motherboard, including RAM (weird low profile 2x8GB DDR3), a 256GB SSD, some Nvidia GPU, and CPU/heatsink/fan, in a case full of cat hair
I also found a BT Smart Hub router/modem, which unfortunately doesn't seem to be supported by OpenWrt (and I destroyed the tabs holding the plastic cover on while trying to take it apart), and a lithium ion battery that probably shouldn't have been in there