IL Deceased Owners Heirs Will Sell Pre-foreclosure CO Property

[Jackie P.]

Summary:

1. Owners:  Husband died in Jan 2021 in CO, wife in Jan 2022 in IL.  Neither had wills.

2. Heirs:  One son and one stepson, both are willing to sell to me.

3. Currently not in probate.

4,  Foreclosure auction moved multiple times, now scheduled early Mar.

5.  I have a CO agent who can write the contract.

Question: Can anyone point me in the right direction with next steps?