Do you know how to write an offer letter for a house? We're here to teach you the ins and outs to improve your chance of closing a deal.This is going to be how to fill out the agreement of sale for pennsylvania. I was wondering does anyone have some type of template to use or can provide some type of example. Any type of guidance would be appreciated. The Pennsylvania Real Estate Seller Disclosure form serves as a detailed agreement between buyer and seller specifically geared toward the sale of vacant lands. Purchase and Sale Agreement. A purchase and sale agreement is a contract between a buyer and seller for transacting a property in exchange for a specific price. THIS AGREEMENT OF SALE ("Agreement") is made as of the Effective Date. What is difference between letter of intent and offer letter?