Yahoo: "Just as important as knowing how to sniff out great buys is understanding what it takes to avoid rip-offs. And with Internet fraud on the rise, it's getting tougher to outsmart the criminals. Complaints to the Internet Crime Complaint Center, a joint operation of the FBI and the National White Collar Crime Center, jumped 22 percent last year. The complaints include plenty of run-of-the-mill scams, like sellers who steal credit-card numbers or take the money and run. But those are child's play compared with what else is brewing."