You can do for sale by owner, however unless you list with an agent or any flat fee realty company, you will not appear on MLS--before pondering doing a for sale by owner, do consider--your house is your home. Emotions are homebound---selling your house is a business transaction. In a business, a professional is able to best to protect your interests. A real estate professional is better at selling your house than you could be at selling your home--also keep in mind that in today's market pricing and marketing that maximizes your exposure are paramount and a good agent will keep you informed as to your competition, market conditions, etc. While some people are successful at selling on their own, others are not--if you decide not to use an agent--do remember to use caution when allowing strangers into your home, hide/remove all valuables, and do consult with an attorney who specializes in real estate beforehand, regarding disclosures, necessary paperwork, etc.