I guess we need to know more about the puppy and it's situation before most of us can make an educated statement.
Personally if I was getting a pup from a breeder. I would not want to get it when it's already that old. I believe some of the strongest impressions you can make on a puppy is probably between the age of 8 and 14 weeks. So to me you are missing out on some critical time with your puppy.
But there are many people here who got their dog at an older age and would say otherwise I'm sure.