A dog is not there to earn money with it, not even on stud fees. Where did you get the idea that your dog should cover a bitch ???
Desire kanst lot, you may find a seed grower is willing to pay what that your dog mounts his bitch and the world with more questionable puppies flooded are ticked in the classified ads.
Reputable breeders would never care about your dog hardly can show the necessary studies on hereditary diseases, show results and breeding license.
VDH breeders their stud dog looking among their peers from good breeding with view to the development and health of the breed.
You can charge as much as you like.
However, no one will get back to you if you or your dog is too expensive.