Your offer's sale price is the most important figure in the letter. Research comparable homes in the area to ensure your price is competitive.View the forms library. This is going to be how to fill out the agreement of sale for pennsylvania. Pennsylvania Free Letter of Intent ( LOI ) Template. Utilize our Letter of Intent to formally express your desire to buy a product or service. 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. A Pennsylvania residential purchase agreement establishes a legal arrangement between a buyer and a seller in a real estate transaction. An Offer to Purchase Real Estate sets out the terms of a proposed real estate deal. Create yours now with our free form.