Depends on the breeder. An okay breeder will charge $250-300. A great breeder will charge much more. If you are buying from a breeder, make sure the parents have hip, elbow, and eye certifications....
A black lab may come to a very expensive rate. As they are amazing, smart animals they may cost from 300$-1300$.It is so worth it though. We just got a baby black lab and he is awesome. Trust me ......