LightInTheBox offers the Whale Swimming Goggles in several colors (Black/Red pictured) for $6.99 with free shipping. That's $5 off and the lowest price we could find. They're anti-fog, adjustable, shatterproof, and scratch resistant.
Note: This item ships from China and may take two to five weeks to arrive. Uncheck "Add Shipping Insurance to your order" during checkout to remove the 49-cent fee.