Focus on three things: State your intentions, show that you have the financial means to make the purchase and make a personal appeal to the seller. An Offer to Purchase Real Estate sets out the terms of a proposed real estate deal.Create yours now with our free form. Here are house offer letter samples to win a bidding war. 3 examples to use as a reference point. We've put together a few tips on how to write a letter to new home buyers as a seller so the house that was yours can welcome them right. Illinois Free Letter of Intent ( LOI ) Template. Utilize our Letter of Intent to formally express your desire to buy a product or service. Choose from our various home offer letter templates to help you and your buyers stand out from the competition. Work with your agent to submit a written offer based on local market value, specifying how and when the steps in the purchase will happen.