Been trying to track down this soundbar from both Costco and Amazon and haven't had any luck. I wonder if Vizio is updating their models or if holiday shoppers have cleared out the inventory.
This model is still listed on Vizio's website as a current model. I guess they just ran out of stock.
It is available at Dell [dell.com]
for $258. The price is not as good as the Costco deal, but it is in stock now.