1. Serious Buyers - Let's be honest, if buyers are out during the busy season, looking for homes, they are serious and ready to buy. Although the summer brings in a large crowd, that crowd contains a lot of people that are excited by the season, and fall into the "trend" of house hunting. These people end up not really being serious about the process, and tend to hold off for another time. If people are investing time to look during the fall season, they are more likely to be interested in actually buying your home, instead of touring it.
2. Less Competition - Selling in the fall isn't something many families can accomplish due to personal schedules. That's why a significant amount of homes get listed during the summer season. Which means that summer time brings in a lot of competition. Selling in the fall means the potential house next door that has slightly more perks that may have been listed during the summer, doesn't make your home sit stagnant, since everyone wanted your neighbor's house. It also doesn't devalue your home because of the house that could go up next door that could be under-priced in your neighborhood, and draw all of the attention.
With a slower season, you get dedicated attention to your property, which increases the chance of a sale.
3. Easier to Find Your Dream Home - Not only do you get to benefit from a slower season during the selling process, but you can also benefit on the buying side. With less competition on your dream house, you can get a better deal. The summer brings a lot of missed opportunities for buyers on their dream homes, because they go off the market instantly. This will give you the opportunity to get your home on the market and take your time to find the right one to resize into. A much calmer pace to the transaction will make it less stressful, and everyone all around happier. Don't feel rushed into buying a home overnight during the summer, it could turn into a headache. If you want a far more peaceful transaction, that has calmer pace, then selling during the fall is perfect for you.