Here is an great example of the type of "Cover Letter and Offer Letter to Bank" that a real estate investor should use to get the deal going. In this video we're going to cover how a purchase contract works.A purchase and sale agreement is a contract between a buyer and seller for transacting a property in exchange for a specific price. A For Sale By Owner contract Ohio must include: 1. The Purchase Price, 2. The agreement must have a start and end date. Download Ohio Real Estate Purchase Agreement template, modify and send for signing using BoloForms Signature. Ohio law protects you in the transaction. The buyer purchasing the property and assuming the existing mortgage. 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.