Don't forget overpriced. And there just aren't any discounts anywhere on those items (vacuums or fans). The vacuums are just made of plastic, so they are not built to last (just like their engineers). Their "bladeless" fans are a curiosity, but upon close inspection, there is a fan in the base of it that has, well, blades! I would have been more impressed if it was more like the ionic breeze air filter that uses electricity only to move the air.
Maybe he will succeed at making a breakthrough in battery technology, but if it's like his other products, it will be too expensive. What good is a cell phone battery that lasts all week when it costs $400?