Found this while looking at another TV deal, this was posted at $500 a while ago but the price has now dropped to $154 at some locations.
As always with Walmart clearance, this deal is highly YMMV & in-store only
Limited stock on brickseek means 1 in stock, so possibly a display.
Check your local store inventory here:
Also saw this 49" 1080P model for $99, but availability is very limited