State of California sells confiscated items on eBay. Actually, it's not just items confiscated at airports -- it's any kind of surplus the state wants to get rid of. See the complete list here. (Apparently they unload some at Goodwill, too.) (SFGate link via ObscureStore)
Perpetual-motion machine being sold on eBay. It's essentially six automotive alternators connected (via motorcycle chain) to an electric motor. One of the alternators supposedly powers the motor, leaving the remaining five to provide 700W of free energy. Sigh...people actually believe this crapola?