Gilt is a membership site where members receive extremely expensive clothing for extremely huge discounts. No catch or anything, just invite only, and I happen to have invites available.
Every day at certain times they feature different high-class brands, and offer 50 to 90% off all sorts of items inside. I've bought a few things from them, and they ship next-day by default for free.
PM me with your email address for an invite (they're free).