Often, newer electrical panels and updated wiring are good indications that a home has been maintained to code. It is always a good idea to have any electrical work completed by a licensed professional. The investment will not only make your home a safer place to live, but will also pay dividends for you when it is time to sell.
Lastly, when staging your home for buyers, avoid using extension cords or outlet splitters. Reducing this type of electrical clutter will keep buyers focused on your home, and not its outlets!