Probably not. Once a donor has made a charitable gift, he or she gives up all right to the money.  Unless the donor has specifically retained power to enforce restrictions on the use of the gift, the donor generally has no right to do anything but watch and complain.  Usually the state Attorney General is the only person who has standing to enforce the terms of the gift.

In this case, since the gifts were apparently not restricted, in the event of a sale, the Attorney General is unlikely to get involved.  Even if the AG were involved, the issue would be whether the sale is appropriate or how to spend the proceeds of the sale, not how to give the money back to the donors.

If you are still a voting member of the congregation, or are friendly with the remaining members, you might be able to influence the members to vote no, or to oust the pastor.  That might make you feel better, but it won’t make you richer.