The ticket prices quoted on this site
Where do you buy them?
Some are discounted compared to at the Gate
Are these the prices is you call direct and order?
If you subscribe to the mousesavers (www.mousesavers.com) newsletter it's easy to get an additional discount. We researched pretty thoroughly last year and undercovertourist was the cheapest for us, by a hair, b/c they didn't charge extra for delivery. And had no problems dealing with Canadians.
As I recall, CAA was not discounted vs Disney website, though hard to tell when it's all wrapped up together. I didn't use CAA on our second trip, so can't say for sure, but it seemed better than the other published rates I could find.