It's very rare to find a vintage clothing store that has a wide selection of clothing from decades other than the 60s and 70s. Wear It Again Sam seems to specialize in finding those elusive clothes from earlier decades. On my last trip in the store, they had a section of exquisite party dresses from the 20s and 30s, lots of bias-cut, glamourous slips from the 40s and a ton of cute poofy summer dresses from the 50s. There was also a rack of vintage kimono's and several shelves of vintage shoes. My favorite section is the purses - they have a lot of classic patent leather purses from the 50s and 60s. They are, like everything else, in great condition.
Wear It Again Sam also has men's clothing (in the front of the store). Hats, gloves, costume jewelry and coats can also been found in nooks and crannies throughout the store.
Prices are on the high side for vintage (most items are above $60) but considering the condition and the age, it is reasonable and certainly a lot less scary than trying to find similar things on ebay. At least you can try these on and see them in person