My wife does, or rather, did Pampered Chef for a number of years. We have one of those apple slicer things. While not the most practical device, it's the best thing there is if you're making an apple pie or two.
However, because of her previous membership, I have cabinets full of crap that never get used. Micro zester? Strawberry/Egg slicer? I've two mandolin slicers - and I admit one gets a lot of use, but two?!? However, the most useless, worthless item in any drawer in our house is this little space-eating cumbersome little thing:
Corn Butterer
God forbid you actually use a knife to butter anything.