I have bought all sorts of things, but usually things with few components.
I have gotten screwdrivers (tri-wing FTW), Micro USB to USB converters (i think the term is transflash), 3D glasses, DS styli, Cases, my Acekard (no longer sold), Magnets (high quality stuff), general cords, a potable speaker, and just some more random crap
Most things are listed multiple times because there will be slight differences in them. look at the 3d glasses selection.
http://s.dealextreme.com/search/3d+glasses.html?category=1202&PageSize=60&sort=-ReviewCountI always make sure to read all the reviews for all the different types, it can make a big difference.