I paid $100 for a track cleaning car with two angled foam rollers on board. It works, but no better than this "Rube Goldberg" cheap but effective MAGIC ERASER track cleaning car. It's a great example of clever ingenuity at a fraction of that price!
QUICK - patent it, start a cottage industry, and offer it for sale via e-Bay!
Mike Mottler LCCA 12394