A buyer broker agreement is a contract with the buyer and the broker to work together for a specified time period to help the buyer find a property.
Posthumous [ a. - Born after the death of the father, or taken from the dead body of the mother; as, a posthumous son or daughter. - Published after the death of the author; as, posthumous works; a posthumous edition. - Being or continuing after one's death; as, a posthumous reputation. Meaning of 'posthumous' (Princeton's WordNet)
Definition of 'legacy'. legacy. A legacy is money or property which someone leaves to you when they die. You could make a real difference to someone's life by leaving them a generous legacy. A legacy of an event or period of history is something which is a direct result of it and which continues to exist after it is over. ...the legacy of inequality and injustice created by Apartheid. [+ of] The old system has left a mixed legacy.