Let's begin by saying that nobody can sell an overpriced home for sale. However, staging your home can help generate offers (generally for more $!) and lead to a quicker sale.
If you understand what you're up against in a tight market, you will know that if your home is the one that looks clean, neat and well-kept, provided you are competitively priced, your home will sell quicker than one that has ignored this attention to detail. We have a stager on staff and we utilize her skills on every listing we take. Why go to this trouble? Because we understand that how we live in our homes is vastly different than how we market our homes for sale. Discuss this with your agent. We don't even take pictures of our listings until the staging is completed. It's that important.
OBTW, everyone feels like they are a stager, even me. However, everyone should understand that a qualified third party stager is worth their weight in gold. The stager looks at your home through a buyers eyes, and that is invaluable. It's important to listen to them. We do.