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. Craft a winning house offer letter with our customizable template and tips.Here are house offer letter samples to win a bidding war. 3 examples to use as a reference point. A Pennsylvania residential purchase agreement establishes a legal arrangement between a buyer and a seller in a real estate transaction. These sample forms may be useful when filing documents for the civil and family courts. If you have any questions, consult an attorney. We offer a customizable sample offer letter to purchase property in PDF. Learn how to write a house offer letter that will be sure to make you stand out from the competition. We're about to provide you with a free house offer letter template and show you how to personalize it to make your offer stand out.