Only you can sell it, think actually sign the contract to buy and sell. The Realtor is there to “MARKET” your home for you; if you will, to get enough folks through the door that one of them likes it enough to want to buy it and take the time to write up an offer.
You get to decide if you like that offer, or want to counter it, or reject it.
An experienced Realtor will know where the market is, both financially and demographically. That is who you hire. And there are other considerations too, such as taxes, estates, divorce, kids, etc. Sometimes, it is not about the money, but rather being able to get someplace else quickly.
It is not enough to just have a real estate license. Experience pays huge dividends sometimes just in stress relief.