Akitas, one of the most popular expensive dog breeds, are strong and dominant and can be aggressive towards other dogs if not properly trained. Akitas also tend to act like felines: They like to clean themselves after eating and may even clean up their owners! The price range on Akitas can vary. Both strains of Akitas (Akita Inu and American Akita) can be expensive. However, purebred Japanese Akitas often sell for more, especially outside of Japan.