Wal-Mart Pre-order question

[pacotacobell]

Posted this in the Anchorman 2 steel thread but I thought posting here would be more appropriate. Anyways, I was wondering how Walmart pre-orders work. I want to purchase the Anchorman 1 & 2 steelbook package but I want to get it at the $25 price that goes live on 3/30. It's $30 right now, so my question is: if I pre-order the steelbook package right now at $30, when it drops in price will I be automatically refunded the difference like how Amazon does it or will I be charged the full amount? I plan on using Paypal if that makes a difference.