Watch this video to learn how to confidently fill out real estate contracts and secure your deal. Learn how to wholesale real estate in Washington: 1.You can always assign a contract unless it says otherwise. This is coming from a local attorney I talked to. Edit, sign, and share wholesale purchase agreement contract pdf online. No need to install software, just go to DocHub, and sign up instantly and for free. A wholesale real estate contract is a shortterm investment strategy where the wholesaler hopes to make their money within 30 days. A Washington residential purchase agreement is used when making an offer to purchase real estate. The agreement initiates the negotiation process. For example, you must always have an assignability clause included in the purchase contract.