It's going to be difficult finding a 'finished' dog for sale. Most PL owners train their personal dogs to that level. It's going to be a lot easier finding a 'started' dog.
What is your idea of 'finished'? What is your price range?
I will have two started labs available by summer's end. At that point they should be through OB, CC, FF, dechased, whoa broke, land and water singles and lots of upland exposure.
It will be a lot easier finding PL's at that level than 'finished'.
Rob