"There used to be dive shops all over the place," says Judy Miller. "Now we're the only one in the area." As the owners of Divers Den Miami, Judy and her husband Jim have been running this one-stop shop for undersea fun since 1977. Experienced divers can rent or buy any equipment they need in this place, which is neatly tucked away in the Shops of Kendall strip mall. Uzzi gear? Check. Mares goggles? There are many pairs, ranging from $60 to $79. A Currents snorkel vest for $49.95? Snap it all up here. And wannabe divers can obtain scuba certification through the store, which staffs two instructors (one of whom is also a trainer of dive instructors, and a University of Miami professor). Dive training sessions are scheduled first in area pools and then with charter groups in the shallow reefs of the northern Florida Keys, and the review course costs just $150. But the best reason to stop by Divers Den is for friendly conversation with the Millers and to meet the store mascot, a galloping galoot of a chocolate lab named DuPont, who plops his furry paws atop the counter as though he's ready to ring up your purchase.