This has been on FatWallet a couple of times in the past (link) at $ 450 and $ 475. Now the price is down to $ 400.

Link to Woot:Scooter

Text from Woot:The Sea-Doo RS3 Underwater Sea Scooter, for boundless energy and underwater adventures. There is nothing ordinary about the way it looks, or the way it glides for that matter. You submerge and it reacts and adapts; you toggle into gear, it comes to life. With its environmentally friendly LI-ION power source and unique, instant neutral buoyancy system, the SEA-DOO Seascooter RS Series offers a bold new way to experience the big blue.

• Ideal for shore dives, snorkeling, or just having fun in the water
• Dual-stage speed control with 2-speed selection
• Impact-resistant handlebar with ergonomic trigger operation
• Automatic buoyancy control
• Li-ion powered
• Recharge battery without having to remove it