Dead Space Deluxe Edition Upgrade

Hello,

As a long-time customer, I feel somewhat cheated by EA. Specifically, when you want to buy Dead Space during a sale, you pay €9 for the base game and €10.50 for the Deluxe Edition. I received the standard version as a gift a year ago and would like to have the content of the Deluxe Edition, but if I want to buy it during a sale, I have to pay €10 because it's not discounted. I find it disgusting that new customers are given so much preferential treatment.