Back in '97 I bought a speed reading program that cost me over a hundred bucks! I was so enthralled by the infomercial where the pitchman raved about all the knowledge that you would be able to cram into your brain and essentially be a super genius. Obviously, it didn't work! What about you?
maybe I'm confusing the OP's question...the "Stupidest thing I bought." Her name was "Madeline." She was pretty dumb ... but actually, a pretty smart purchase on my part.
I once spent $100.00 on that stupid "clown town" game where you put a quarter in and it supposedly pushes more quarters and junk off the ledge at a fair. In my defense, I was 12 and didn't know I could have gotten a bj from the skanky fair operator girls for that kind of money. I walked away with a whistle and a pair of handcuffs with no keys. Ah good times...
I bought a pair of pinhole glasses. The premise is that it helps improve your vision when you look through small holes on an eye glass. Luckily, I only spent 10 bucks on it. I think it actually would have worked better, if my vision wasn't so bad to begin with. Here is an explanation of pinhole glasses if you are still asking wtf: http://www.myopia.org/pinholes.htm
Today my Mum asked me if I'd burn a CD for her....very strange. I asked what she wanted on it. She had bought one of those "Wholesale Lists" off Ebay for $10. She couldn't understand why I broke out laughing at her.
A fan with a remote control. As soon as I got home I thought "man what do I need with this?" Took it back the next day. When I was a kid, my dad bought a picture-in-picture box for our TV through an ad he found in a magazine. It worked fine for about a week, then my dad noticed burn marks on the TV where the box sat. He tried to call the company but the number didn't work anymore. They had gone out of business and we were stuck with the box.
There was this white dude on QVC that had a show on trading cards. The way he spoke made me believe i was going to get a bicmac and/ or barry bonds rookie card. I spent 150 dollars and all I received was junk. I was 20 years old.
When I was a kid I bought a venus fly trap plant off the back of some old comic book. It never came and I was so sad not to be able to watch it eat up all the bugs.
I bought an semi-expensive tennis racket on a whim and didn't like it at all -- that's one of the most recent things at least.
I was thinking about this infomercial the other day. It's the one where the old freak massages/strokes the pages of the books back and forth really quickly right? It looked so weird and odd but he sold it pretty well.