You can get an MLS listing through an online site for about $300. That really expands your exposure. Usually, they include listings on Zillow, trulia, etc.
Decide on a commission for a buyer's agent ( usually 2-3%).
Pay someone to take good photos. You think you can take good ones. You can't.
In the end, a realtor can be a real asset. I sold my house in FL by owner 11 years ago, but it was in a very desirable neighborhood. Since then, I've tried twice and resorted to a listing agent after a good while, both times with success.