Walmart offers the RCA Virtuoso 50" 4K Flat LED Ultra HD Smart Television, model no. RNSMU5036, for $269.99 with free shipping. That's $430 off and the best deal we could find, although we saw it for $30 less last month. Features include:

3840x2160 (4K) native resolution

WiFi & Bluetooth

streaming media apps (including Netflix, YouTube, Pandora, more)

3 HDMI inputs