Lionel Sandy Andy Automatic Gravel Loader
I picked up one of these at the Great Midwest Train Show before Christmas. It was billed by the dealer as being "basically a perpetual motion machine". Unfortunately, one of the plastic pieces in the box was broken, so it didn't work too well.
So, I went looking on Ebay for another one to use as parts. Found one for just a few bucks. When it arrived, guess what? Had a break in the exact same spot. Thinking I've found the vulnerable piece in the production, huh?