As I said in another thread...
Best Buy will start taking pre-orders for the 8X and 920 tomorrow (10/21). The contract price of 99.99 for the 8X and 149.99 for the 920. Unfortunately, the only color options are Blue for the 8X and Black for the 920.
How do I know this? Well I do work in BB Mobile, and this is what showed up in our employee news. Yes, the 8X contract price is 50 dollars less than Walmart's. However, it should be noted that the 8X price was for T-Mobile, and T-Mobile may charge a higher contract price like they did with the S3 initially (249.99 with a 2 year contract).
All that is required is a 50 dollar deposit. So to be quite honest, I am not sure if the contract prices listed above reflect that of after the deposit or not. I read it a few times over, and it doesn't seem like that is the case.
Edit: This also leads me to believe that, due to the promotion BB is having, the Lumia 920 will have a contract price of 199.99, and the 8X at 149.99.