Complaining about a few bucks after the fact is pretty petty. I'm not going to disagree with you that sometimes Simu isn't a bastion of custom service gurus, however... That being said, outside of a few big box stores, multinational corporations and Forbes 50 retailers, you're not going to get much in the way of a refund from price drops.
New shit = Costs more
When shit isn't so new = Price drops
This is Econ 101.