how to buy unprobated land from heir of deceased father

[Michaell Oble]

i am in indiana if this makes any difference concerning answers to this question about how to buy land from son of deceased father whose father died 8 years ago and there is no will and there has been no probate by of the estate involving a property offered several times at tax sale without bids even for 10 cents on the dollar as this is a superfund site and back taxes are $222,000.00 for this property assessed at $200,000.00 that the son has no incentive or interest to probate or own title?

Is there a better forum to presen4 this question?

Would an affidavit of heirship followed up with an affidavit of deed be the way for this heir to give me a quit claim deed for a few hundred dollars be a good way to do this?