By Adalheid Voigt. Sofa. At Thursday, February 28th 2019, 21:55:38 PM.
Wrap the foam with multiple layers of batting. A small amount of spray adhesive applied to the foam can help the batting stick to it so it stays in place once you put the covers back on. If possible, have someone help you put the covers back on the cushions. All those layers of batting make it a tight fit- but that is what you're looking for, so ask someone to lend a hand to make your job less painful.
If you're unable to reach up into the corners, a tool or something like a ruler wrapped with a soft towel will help to send the fill up to round out any sunken edges. I used a cordless telephone. True story. Add filling until you can't add anymore, and then add more. Continue to add fill as you back your hand out of the cushion, making sure there is a decent amount down by the zipper -you don´t want what you stuffed up in the top of your cushion to all settle to the bottom.
If you have many items to sell, a garage sale can be a good place to sell your couch, since such sales usually draw a good crowd of people looking for exactly this kind of bargain. Consider placing your used couch in a church, community center, or school rummage sale. Your participation might involve little more than hauling it there, which eliminates any worry about organizing a sale on your own. Consider this if your sofa happens to be the only item you need to sell.