Woot! is a kind of odd duck in online merchandising. They take overstocks, closeouts, and other items and sell them online. Nothing new there. But their Unique Selling Proposition is that they sell said items, one item per day, until they run out. In other words, if you don’t buy today, it won’t be for sale tomorrow. And it’s first-come, first serve. When they run out, they’re out. Allegedly . . .