As I a sure you all know, I love Neiman Marcus. At original prices the brands they carry are way out of my reach. But being the deal hunter that I am, I always wait for the sale and then can usually get a better deal than I can find at Nordstrom, Saks or Bloomingdales. Today for example is the last day of their Real Deal sale, where you can get an addition 10% or 20% off the sale prices online, which make the savings about 65% off. By filtering by your favorite designer, size, and/or desired price point you can narrow down what you're looking for pretty easily.
There are seasonal finds as well, so don't think all you can find are summer steals.