As our sons started to dip their toes in online consumerism via eBay and Amazon, I realized it was time for an education. Armed with gift cards and trigger-happy index fingers, it was too easy to buy. They lacked the healthy skepticism smart consumers have. They would inadvertently buy an accessory to something, when they thought the main item was included, for example; or they were lured into knock-offs that they believed were real. Investing can be tricky like that, especially if you are not Read on...