I have found a great many bargains at the Exchange in Squirrel Hill. I used to think that the staff were scary in a very hip/fashionable way, however I have found that when you ask them a question about the music, either they know the answer, or someone in the store who does. They don't fake the answer, either, and often they are knowledgeable about many different genres, and about music that existed before they were born! They have also been helpful in guiding me to a store that may have the CD I am looking for. Also, at first I did not understand the pricing, but then realized that if they have a lot of copies of a particular CD, they are often willing to sell it for less.