Make your opener as personal as possible. I want to write a letter that is compelling.My realtor says he's not allowed to attach letters to offers because he can lose his license. 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. Address the Seller and Introduce Yourself. Here are house offer letter samples to win a bidding war. 3 examples to use as a reference point. We're talking about how to write an offer to purchase a home all right so how do you structure your offer to make sure that the seller accepts it. Consider the pros and cons of writing a house offer letter in real estate transactions. Learn when to write a letter and when to avoid one.