Hi there, Katie!
When you visit the
Dining Reservations page on the main Disney site, you have lots of options to get to each restaurant. I like to use the Restaurant List tool on the right side of the page.
Almost every restaurant page offers a link to a .pdf of a sample restaurant menu -- and these do include prices (minus, of course, tax and gratuity).
The exception to these is the collection of prix-fixe options: buffets, shows (like Hoop-De-Doo and Mickey's Backyard BBQ).
You can always give a call to (407) WDW-DINE and ask the Cast Member for a list of items and their prices. The Cast Members typically have the most current menu printings - and therefore the most up-to-date prices,
Fan sites like www.AllEarsNet.com are great about having menu items and prices on hand, too. Please remember, though, that while excellent resources, fan sites are not affiliated with Disney, and can not promise the level of accuracy that Disney sites can.
Have a wonderful trip!
See you later celebrator,
-Deborah B.