She is first timer 6 teeth

First calver with six teeth is still a decent dairy animal, but two lakh rupees is on the high side unless she is a proven high-yielding Murrah or Nili-Ravi type and gives strong milk after calving. As a general market idea, a good dairy buffalo like Murrah usually sells around one lakh to three lakh rupees, but first lactation animals are valued lower than proven milkers. If she is healthy, has a good udder, and starts giving well, you can ask a better price. If you want, list her on Pashushala and compare nearby buyers.