Ashera. PRICE : $15,000 – $100,000. Ashera is also a hybrid cat the African serval, the Asian leopard cat, and a domestic housecat. It is very intelligent, affectionate and loyal.However, the authenticity of the breed has been challenged, as the only known examples of “Ashera” cats have been proven by DNA testing to be Savannah cats – our number two – sold for four times the real price. It also may be the rarest cat in the world.