If you go out and Buy a C6 today, chances are you are going to pay over sticker. In six months, when they are selling for sticker are you going to go back to the dealer and cry foul? What about when the 2006s come out, and they offer rebates? What then?
When you buy a product, you can not see in the future. Companies can't know what lies ahead and they are certainly not going to tell everyone. If they now stated that the price was going to drop $10 every month, are you going to wait 40 months (or what ever it is for what you want) so you can get it for free? NO! It is what it is. If you think you are being screwed, I recomend you wait a month and see what happens. The problem with that theory is next month you will need to wait another month. It never ends.
Get over it. This is a good deal. Be happy about it. It will save you money in the future.