Selling Our Bull

We have decided to sell our 4 year old brindle bull. He is unregistered, but from a breeder that breeds registered cattle. My understanding is that he is Unable to be registered. He has sired several calves for us and has done live cover services locally. He is relatively calm and gentle, loads and trailers pretty easily, although we do not work with the cattle to be halter broken. We have decided to keep two of his lovely heifer calves and do not run a large enough operation to have multiple folds. We are asking $1400.