Leisure Pro offers the Aeris AT 400 ION Swivel Regulator in Blue (pictured), Red, or Black for $249.95 with free shipping. That's $100 off and the lowest total price we could find. This scuba diving regulator features a chrome-plated brass first stage with two HP and four LP ports, and ABS/polycarbonate composite second stage with an orthodontic mouthpiece, Venturi control switch, and more. Deal ends April 30.