I never buy anything at full retail value. It's a principle I live and swear by, thanks to a frugal upbringing. Before moving to New York I dreamed of attending Barneys' infamous warehouse sales, but in a bittersweet moment the sale shuttered its doors. But I was in luck! It would move online, and now everyone could shop their additional 40% off final sale section from the comfort of their own homes. Here: that one plus six more of our favorite discount shopping sites, with tips on what to buy from each shop. Because why would you ever queue up at 5am for a sample sale when you can get the goods from the comfort of your own home?