I want to buy a cow from Gujarat under 15000..

For dairy, a good cow under fifteen thousand is very hard to get in Gujarat. At that price, most animals are old, thin, or low milkers. If you still want to buy, look only for Sahiwal, Gir, or HF cross, and milk her in your presence, do a CMT test on all four quarters, check lactation month, age, body condition, and vaccination record. For a safe purchase above fifty thousand, take a Pashumitra or vet.