For its members only, Costco offers the Samsung 350-watt 9.1-Channel Curved Bluetooth Soundbar with Wireless Subwoofer, model no. HW-J8500, for $449.99 with free shipping. That's the lowest total price we could find by $250, although most retailers charge $911 or more. It features a 20Hz to 20kHz frequency response, built-in WiFi, Bluetooth, TV Sound Connect, and USB and HDMI inputs.

Costco also offers its members the Samsung 320-watt 8.1-Channel Curved Bluetooth Soundbar with Wireless Subwoofer, model no. HW-J7500, for $349.99 with free shipping. (Non-members pay an additional $17.50 surcharge.) That's the best deal we could find by $167. Features include built-in WiFi, Bluetooth, TV Sound Connect, and an HDMI input.