For sale: Purebred German dairy cows. The large red cow is around 4 years old. The small red cow is around a year old and ready for insemination. Purebred German dairy cows. The large white cow is around 5 years old. The small white cow is around a year old and ready for insemination. None of them have been inseminated, and they are guaranteed to be in perfect health. Price is negotiable (on bid).