This is a sample of 3 pages out of 8 of the International Sale Contract. This Standard Document is a long form agreement for the purchase and sale of commercial real property favoring the seller.A purchase and sale agreement is a contract between a buyer and seller for transacting a property in exchange for a specific price. Before a purchase and sale agreement, a commercial real estate transaction will usually begin with a letter of intent (LOI) or a term sheet. 1.5. "Personal Property". A commercial purchase agreement is a legal real estate contract that transfers commercial property ownership from a seller to a buyer. This is an example of a regional sales contract that is used in the purchase and sale of real estate property. Document the sale of real estate. Forms and Sale Clauses - Commercial Real Estate Week 5. SPAs are typically used for real estate transactions, but they are found in other areas of business.