BROADCAST DATE : Jan 28, 2011

Clean Water, Dirty Tricks

Marketplace goes undercover to expose the techniques used in door-to-door sales of water purification systems — devices that can cost thousands of dollars, but which most people simply may not need. Co-host Tom Harrington investigates the scare tactics used to entice people to buy — and meets an elderly woman who spent $3,500 on a purification system.