Thanks for all the advise.
Some additional information......
The Executor of the estate signed the contract.
The title company wants all the heirs to sign a release before they issue the title policy.
The Language in the contract is fairly strong, although there are no dollar penalties for the seller.
From the contract:
[b]At the close:
"Seller shall execute and deliver a general waranty deed conveying titile to the property to buyer and showing no additional exemptions or delinquent taxes."
"Seller and buyer shall execute and deliver any notices, statements, certificates, affidavits, releases, loan documents, and other documents required of them by this contract. the commitment or law necessary for the closing of the sale and the issuance of the title policy"[/b]
i.e. All the children must sign if the title company requests it.
I have been told by a lawyer that it is very unlikely that a judge will force them to sell the house to me. Although I should be able to collect any expenses I incurred during the buying process.