1.There is embargo on the sale of Sc/st land but the same does not apply to flats.
2. So if you get a buyer and money is settled then receive at least 25% of the total amount and make a sla agreement.
3.In the sale agreement do mention the time limit within which the buyer will have to complete the sale on payment of balance money.
4.Before the signing of the sale deed receive the balance money.
To check the sale agreement and sale deed take help of an advocate.