If you are not a licensed broker at the time you sell your own home, legally, you are not held to a different or higher standard than any owner selling his or her own home. Practically, IF there were to be some problem with the home or sale and IF the buyer were to sue you, one could imagine the court, IF your background as realtor came out, holding you--even if not properly; courts do improper things all the time, since courts are made up of people, and people can react in emotional or "gut" ways--to a higher standard than a layperson. Therefore, it would be reasonable to say that there is a small chance that in the event of a dispute that goes to trial, that your background could work against you.