CONTRACT OF SALE – OFFICE, COMMERCIAL AND MULTI-FAMILY RESIDENTIAL. PREMISES. This document is a purchase agreement between a seller and buyer.This agreement is contingent upon Purchaser obtaining approval of a. Conventional,. I'm gonna break down all the terms and conditions so you can understand what it means and we're gonna fill that out so you can have a real-life example of it. The Title Company shall be requested to complete all such matters as promptly as reasonably practicable. If an agreement is made, the seller must complete and put forth disclosure forms to the buyer.