Lesson 3: ... and then they get really cheap
Exploit end-of-life-cycle pricing by shopping for a product when its new version has launched. Today that Razr V3 sells for a mere $50 with a contract since Motorola is pushing its MotoKrzr.
Similarly, the new Mizuno Wave Creation 8 sneaker retails for $130, while the Mizuno Wave Creation 7 (originally $120) can be had for $85. Once the Creation 7s are gone, however, there's no restocking.
Shopping at discount retailers like dollar stores and outlets can also help you capitalize on life-cycle decline. "The shelf life of detergent may be seven years. So Dollar General locates a warehouse of Tide that's five years old," says Underhill. "And they purchase that warehouse at a discount." Since it's not "fresh," they're able to undersell supermarkets. But since it's still usable, there's no real downside.
Maricopa County, Arizona added the most residents in the U.S. Census Bureau's latest ranking. (more) 
