Buy.com has the Hawk SH-150.1 ScoutAqua Water Scooter for $87 with free shipping.
--The Scout can be used in the Ocean, Lakes, Rivers, or home pools
--12v 7Ah rechargeable battery allows for a run time up to 1 hour on a 4 to 6 hour charge; Dive rated up to 65 feet; Speeds up to 3 miles per hour