Need help on next action

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I am meeting with someone who is going into foreclosure. After I talk to her, how would I make sure another buyer comes in to take the sale? Is this done by putting the property under contract? Would an Option Agreement work? A contract saying something like, "The Buyer has right to purchase the property within 30 days of date of this contract and additionally can assign this contract to qualified buyer meeting all terms and conditions as required from Seller. Upon non-performance of Buyer to exercise this option no remedies cumulative by either party will be applicable and earnest money will be fully refundable to Buyer."