Is there any restaurants that are underprice?
It does not matter if you get the $65 porterhouse at Shula's or a $4 Hotdog at Casey's Corner, ALL DISNEY FOOD IS EXPENSIVE. You never really get what you pay for.
If your were outside WDW it will usually cost around half the disney prices. It may cost you a arm and a leg to feed a family of four, but I never had a bad meal.
The prices are almost expected when you are in a resort environment, becuase your trapped.