It turns out the J.Crew regional warehouse sale is located 10 minutes from my house. This is awesome. And very very bad.
There are racks and boxes and piles of clothes everywhere, with ladies stripping down and trying things on for friends to judge (there are no mirrors or changing rooms to see for yourself!). It is crazy. But also so great - I've found a bunch of really cheap stuff, including some formal dresses for $16 each!