The Standard Agreement for the Sale of Vacant Land (Form ASVL) is the contract for the sale of unimproved real estate containing commonly used clauses. View the forms library.Sellers who wish to see or use the basic disclosure form can find the form on the Web site of the Pennsylvania State Real Estate Commission. A Pennsylvania real estate listing agreement gives a real estate agent the right to list, market, and sell residential property for a homeowner. Access the entire library of over 400 RPI forms for your professional use – FREE. Sellers who wish to see or use the basic disclosure form 7 can find the form on the Web site of the Pennsylvania State Real Estate Commission. Unimproved Property Contract: Use this contract for land without any improvements, with specific details for platted properties.