Thorough Record Keeping
Although real estate agents aren't lawyers, they can serve as good resources years after a deal is closed. In some states, licensed agents are required to keep full files of all documents in all transactions for several years.
While you may (and should) keep files yourself, you can count on your agent to keep that information organized and safeguarded should trouble crop up with the property in years to come. You'll also be able to contact your agent at any time in the coming years should you have questions about the property yourself.