LOL, I have 3 road cones(the big ones with reflectors that we stole, a ton of full size road signs(from a relitive who "found" them inclueding a no parking sign, speedlimit sign, Entering and leaving city maintenice signs, dangerous road, road floods, and humongoid arrow sign. And a licience plate off of a fire truck....), 2 of those blinker things(the battery powered ones, they don't work and I took 1 apart), tons of plates from my mom's '80 Corolla to my dad's '78 Honda motorcycle and a lot of our other cars, my bro has about 3 sets of rims, several tires, tons of floormats, Eclipse tail lights(I don't know why...), Millenia head lights(again I don't know why), and a whole lotta other crap.
In our garage my dad has a dealership "Mazda" sign(not the one with the logo, not even his dealership has one of those cool ones), a Mazda "Full circle" service sign, an RX-7 specialist sign, and other stuff(although I wouldn't mind having that huge Mazda sign above my bed room door...).
As for my own useless stuff...a VCR that doesn't work with Dish(cause it's old) but records fine but plays back with static out the waazoo, a desk(but it's part of my bed so it's not useless I guess but it's too small and compacted to do anything, I tryied useing a typewriter on it back in the day(hey wadaya know, another useless thing my dad still has)and when the slider dinged it flew back the otherway, slamming into the side of the desk, and made this awful dying sound...)and that's about it cause my room is soo small that everything I have in it needs to have a purpose...