
To properly rear, including health tests, stud fees etc, it will cost that much to rear a Labrador puppy to selling age.
Youy will be looking at around £400 - £500 for a well bred puppy. I would strongly advise choosing a breeder who belongst o one of the breed clubs, as they are more likely to have a profound interest in the breed, other than producing puppies.
Good Luck :D