If you're listing a house for sale this fall - especially one you've been working on all summer - there are a few mistakes you should avoid in order to sell it quickly and at the right price. Check out this list of three no-gos for selling a house in fall. Selling a Flip This Fall? Don't Do This to the Porch When you're selling your flip in the fall, never: Overdecorate the porch Let leaves and other debris build up in the corners Neglect the windows and front door Let's take a closer look at each of these. #1.