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. Discover an impactful sample letter of an offer to buy property.Show sellers your genuine interest and secure a dream property. Here are house offer letter samples to win a bidding war. 3 examples to use as a reference point. An Offer to Purchase Real Estate sets out the terms of a proposed real estate deal. Create yours now with our free form. A Pennsylvania residential purchase agreement establishes a legal arrangement between a buyer and a seller in a real estate transaction. These forms will be useful when filing required documents related to estates of deceased or incapacitated persons. Forms. Applicable Laws and Information.