We understand the allure of "Buy It Now." And with PayPal integration, shopping on eBay is just so easy! Just wait until they get the whole same-day-delivery thing sorted out. But before you click, take a few minutes and peruse the listings of whatever shoe it is you're about to spring for. Maybe that Buy It Now is set well above the going price. Don't pay a premium just because you're in a rush. Which brings us to the next point...