Many breeders(across the globe) sell their pups at pedigreedatabase.com, pup and adult dogs.
If I were to import a dog, i would import an adult who has a credable title, that way i'd know its a proven specimen of its breed; bescides its harder for a puppy to make that trip in a crate.
Bescides the adults at sale are trained, one can find a schutzhund or tracking trained gsd (one needs to be a handler of equal expertise)... or just an adult dog with little training.
Tho I have no idea on import regulations/ customs fee n so forth. Price of the dog depends on his titles, training & age, can cost between 1000 to 3000 us$