Probate Question: Heir of the decedent kills the deal

[Elijah Artman]

We have an elderly gentleman (seller) who is not on the title of the house.  His wife died last year and he is trying to sell the house in Sacramento (Tahoe Park area) for under 100K.
He filed a probate petition, court ordered that 30% of the profits must go to the heir (a daughter of the deceased wife) which the seller doesn't agree with. (he claims that he doesn't even know her)

As an interested buyer, what can I do to get this deal?
Is there a way I can pay the beneficiary (heir) to sign off / release the deal? (what form would it be?)

looking for advise from attorney, probate lawyer, or someone who had similar experience.