We have a box with two TI-83 Plus calculators, some scientific equipment, and a manual for how it all works together — all free to a good home. If you’re interested just come by on an open night and pick them up. Photos are in the link. Rules are you have to take the whole box and you have to pick it up on an open night (Monday or Thursday).
We also have tons of head-mounted magnifying glasses (HEAD MAGNIFIERS!) Pick up as many as you’d like on our open nights, but do it soon before someone just tosses them in the trash in frustration and then they’re gone.