After the Death of your grand fathers the power are inherited to their legal heirs (8 Successors)
1) All 8 Successors are equal right shares holder as per HIndu Succession Act, Class I heirs
2) The Rights are Transferred by way for Transfer of Ownership (Land sold) to Buyers. And land is transfer on Buyers Name for 3 Successors Share rights.
3) The Gift Deed is invalid for the shares of 3 Successors who have already sold the land.
4) The Gift Deed is Valid for the shares of % Successors who have not sold the land but did Transfer of Ownership by the way of Gift deed.
5) Both Sale deed and Gift deed are partially Valid according to shares rights of Successors.
6) Legal action can be take against sellers who have signed the gift deed after selling the land, Fraud, Misrepresentation.
7) Which deed is more valid ......... ? refer answer point 5.