CD Trader is a small store, but I have bought many fantastic records here. They seem to be a little more discriminating in what they offer for sale, so you don't have to wade through junk to find something worthwhile.
But, the best feature here is a computer database that lets you search the store's inventory. The computer tells you if the title is in stock, the price, and where to find it in the store. Fantastic!, and a great time saver. Why don't all used CDs shops offer this service?