East Coast TVs offers the Samsung 78" 4K 2160p LED LCD Smart Ultra HD Television, model no. UN78HU9000, bundled with a Flat Wall Mount for $5,525 with free shipping. (Price shows in-cart.) That's $1,395 under the lowest total price we could find for the TV alone. It features a 3840x2160 resolution — four times that of 1080p TVs. It also has a 120Hz refresh rate, WiFi, Internet Apps (Netflix, Hulu Plus, Amazon Video, more), three USB ports, four HDMI inputs, and four pairs of 3D glasses.

Note, if you don't mind paying with a certified check, money order or wire transfer, you can drop the price further to $5,360.16 via coupon code "PAYCHECK".

Update: The price has dropped to $5,419 in-cart, and it's $5,257.32 with optional coupon above.