The Lafayette Flea market is huge and has tons of different dealers with all kinds of stuff. They have the antiques and collectible stuff you expect plus all kinds of other goodies. There's a great selection of books, including a first edition Stephen King (not that it'll still be there). A new dealer moved in selling and repairing computers. You really need a couple of hours to properly shop the whole place but it's really worth the time.
Pros: great deals
Cons: limited price flexibility