Adorama offers the LG 50" 1080p WiFi Plasma Smart TV, model no. 50PB6650, for $499 with free shipping. That's the lowest total price we could find by $100 and among the least expensive 50" Smart TVs we've seen. It features a native resolution of 1920x1080 (1080p), 600Hz sub-field drive, WiFi, LG Smart TV with Netflix, Hulu Plus, and Amazon Instant Video, and three HDMI inputs.