I traded a thumb tack for Meredith's junk, for Kelly's crap, for Phyllis's garbage, for Oscar's trash, for Stanley's crap, for Ryan's junk, for Creed's garbage, for a very cute squid that Erin happened to have.
I started with a thumb tack and traded my way to a telescope. But in a way the most valuable thing here wasn't the telescope at all. No. It was this packet of beans. So I traded telescope or it, and I can just go buy another telescope.