A mini flashlight called the Streamlight Nano (takes four tiny batteries - that cost more than the damn flashlight). To be fair, it's a bright little thing for something the size of my little finger, but I didn't use it much for fear that I'd drain the batteries. And then I bought a tray of the little things, and never used them as well.
A cheap folding knife when I was at the local anime/nerd convention. Pretty little thing, but the screws came out after an emergency doorknob removal. (I was cooking downstairs, and my doorknob pulled out of the door, and I literally had to break it down with just a leatherman tool and a pocket knife.)
The 7 Year Pen - a plastic pen that holds an insert with 7 years worth of ink. Problem is that the plastic threads are wearing out and the metal nib is falling off. Had to fix it with teflon tape, but seriously, that was a bad choice. However, it's a very smooth pen - I'd probably ask the company to make one in all metal...