View the forms library. If you are planning to make an offer in Philadelphia, we've compiled a stepbystep guide so you know what to expect.Your Elfant Wissahickon REALTOR will review the documentation with you to help you make a decision about the acceptance or negotiation of this offer. A Pennsylvania residential purchase agreement establishes a legal arrangement between a buyer and a seller in a real estate transaction. Join the Do Not Solicit list to stop wholesalers and real estate professionals from contacting you about selling or renting your home. This FSBO paperwork is needed as soon as you accept an offer, so it's useful to have a purchase agreement onhand that you can fill out quickly.