A For Sale By Owner contract Ohio must include: 1. The Purchase Price, 2.It's possible to sell your home without an agent in the Buckeye State, but it's a lot of work. Here's what you need to know. Only brands with the (NPM) designation need to be reported on this form. Any brands not listed on this site are illegal for sale in the state of Ohio. A master purchase agreement is a legally binding contract between buyer and seller, and typically relates to buying and selling goods rather than services. For a sample pro-seller master sale of goods agreement, see Standard Document,. Sale of Goods Agreement (Pro-Seller). (2-518-9260). An Ohio real estate contract is a contract that facilitates the sale of real property between a seller and a buyer.