First send the legal notice and provide them a time and then on that day mark ur precence before tehslidar and then u can get permission from court and sold the land.

If u dont want such lenghty process then leave the ocurt permission and do the rest two things, it may also solve ur problem but in future it may create some problem.

Regards

adv.kamal.grover@gmail.com

It depends on the agreement terms whether you can compel him to purchase or can sell to third parties.

u may have to file a suit for specific performance seeking direction of the court against the respondent for performance of his part of the contract.