Adorama via eBay offers the Vizio 48" 1080p WiFi LED-Backlit LCD Smart HD Television, model no. E48-C2, for $350 with free shipping. That's the lowest total price we could find by $69, although we saw it with a $150 store gift card for $400 in February. Features include a 1920x1080 (1080p) native resolution, full-array LED backlight, Vizio Internet Apps Plus (Netflix, Hulu Plus, Amazon Instant Video, etc.), USB, and three HDMI inputs.
Also available is the Vizio 43" 1080p WiFi LED-Backlit LCD Smart HD Television, model no. E43-C2, for $270 with free shipping. That's $60 below our April mention (which included a $50 store gift card) and the lowest total price we could find by $119. It has the same features as the model above.