Most trades end up one-sided, partially because humans are inherently selfish, but mainly because there's no way you should've ever given Jordan that Benito Santiago rookie card just because you have a crush on Jubilee from X-Men. To trade for something that won't lose value when you fold it, talk to the dude behind Please Trade With Me.
From a Coronado native who's “really open to anything” but probably not talking about swinging, PTWM is a project born from finding that the sweet chairs he invested a lot of time/ money in weren't really meeting their full price potential, so he decided he'd feel better if people were willing to trade something for them that they value but isn't necessarily worth a lot of money (expect a lot of money...from Greece). The unique concept started as an industrial design final project at Hampshire College (suck it, SAT scores and grades!), is constructed from a 5'x5' square of Baltic birch plywood and custom hinges, which lets it fold to 5'x2.5'x1.6" for easy transportation or storage, and draws inspiration from pop-up books, aka the collected works of Ken Follett (dude writes mad sexy!).
Although he “hope[s] to accept everything”, successful trades so far range from a local dude willing to give a gaggle of wild mushrooms (the “gourmet” kind, allegedly), to an artist from LA offering up a medium-format camera and portrait, to a teacher from Virginia proffering her young pupils' art, even though countless budget meetings have found it to be just about as worthless as having your mutant power be fingertip fireworks.