Before you think about purchasing this type of dog or any dog in general you need to make sure that it fits your lifestyle. Different types of dogs have different activity levels and personalities that may not suit your way of life.
If you are a very inactive person with no land then you should not buy a big active dog because the dog will require you to do what you are not comfortable with in order to stay healthy. That being said, make sure you do lots of research on the different types of dogs to understand the work involved and to choose the appropriate breed.
There are many different places to buy a purebred Akbash dog all over the world. Obviously the best thing to do is to Google the closest breeder to where you live if you are interested in making a purchase.