Almost everyone who thinks about selling their home contemplates hiring a do-it-yourself kind of outfit that seems to cost less than the cost of hiring a Realtor. And that's completely understandable. Everyone wants to save the $$$ wherever we can.
Just be aware that the banks and mortgage brokers will insist on an appraisal before they allow the financing on the deal. They suspect that sometimes buyers are willing to pay more than they should for a property that is not on the "MLS" system.