When it comes to filling out a real estate purchase agreement, several key players are involved: buyers, sellers, real estate agents, and attorneys. Learn the steps in a real estate transaction and what happens with sale of property.Find a real estate lawyer. A purchase agreement is a contract between the buyer and seller of a home. It contains all the rules that apply to the sale. Many of the steps in purchasing a new construction home are similar to purchasing a resale, such as signing a contract and securing a loan. There are some more nuanced items you should be sure to include in your real estate purchase contract, including the financing terms and closing date.