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. Pennsylvania requires those selling FSBO to fill out and file many documents and forms.Several of these documents are legally binding agreements. Any other methods for buying a house without an agent? Yes, you can sell a house without a realtor in Pennsylvania. A For Sale By Owner contract Pennsylvania must include: 1. The Purchase Price, 2. Selling a house without a Realtor in Pennsylvania is possible, but it's a lot of work. Here's how to do it, with pros and cons. You'll need to fill out or obtain at least 14 documents, including the purchase agreement, closing statement, and bill of sale.