In urban parking lots and open fields, the U.S. is covered in swap meets, trade days, and other varieties of the venerable flea market. Not all are created equal, however, and whether you're looking close to home or bargain-hunting on the road, the key to finding great flea markets is locating ones with the most variety and best quality. The U.S. Flea Market Directory separates the treasure from the junk by listing the best in each state - markets...