VM Innovations via eBay offers the Sennheiser adidas MX 680 Sports Earphones for $19.99 with free shipping. That's tied with our expired mention from a week ago and the lowest total price we could find by $5. Features include DuPont Kevlar-reinforced cables, sweat- and water-resistant construction, volume control, various custom fit silicone earbud adapters, and frequency response of 18Hz to 20kHz.