The Tibetan mastiff is considered the most expensive dog, as it has sold for thousands and even millions. In 2014, a Tibetan mastiff puppy was sold for nearly $2 million in China, according to AFP. This wasn't the first time this breed of dog had a high price ticket. In 2011, another Tibetan mastiff puppy sold for $1.5 million, according to NBC News. Click the link in our bio to see what the top 10 most expensive dogs are. #tibetanmastiff #dogs