Buy.com offers the IOGear 3D Wireless Media Kit
, model no. GW3DHDKIT, for $199.99 with free shipping. That's the lowest total price we could find by $59. This kit allows you to stream wireless HD content (up to 1080p) from your computer to your TV. It features HDMI and USB connectivity, a wireless range of up to 100 feet, 3D support, and more.
Update: Costco offers this item for its members for $189.99 with free shipping. (Non-members pay an extra $9.50.)