These are the best Christmas prices available on web for Lumia 920, Lumia 822 and Lumia 810.
On Amazon, Lumia 822 is listed for $0.01 but both Black and White are backordered and may take 1-2 weeks for delivery. Alternatively, you can opt for Walmart as well, which has a price of $9.99 and the device is in stock.
Best price for Lumia 920 over web is again at Amazon for $39.99. Red has gone “out of stock” and not even available to order. Only Black and White is in stock and ships in 24 hours.
Best deal for Lumia 810 is offered by T-Mobile itself and is available for “free” thru 27th December. This offer is web-only.