There are many ways to value your home, contact a local agent, looking online at similar properties that have sold but to know what your home is truly worth, before you call an agent, call a registered valuer.
A valuer is not biased about your home because they have no financial interest in being selected as an agent to sell your home. You ( the vendor) are naturally biased because you want the best price. The agents are biased because they want to be selected as your agent. And the buyers are biased because they want to buy for the lowest price. Valuers are the only people who are not biased - they get paid no matter how much your home is worth.
Valuers are highly qualified, theirs is a specialized field. But most important of all - from an accuracy point - a valuer can be legally liable for a mistake. Valuers are careful. You too should be careful. You should have an independent valuer - not one who works in a local real estate office - inspect your home before you call an agent.
A valuation is a great investment for home worth hundreds of thousands of dollars. It gives you powerful knowledge. It enables you to make plans based on facts not opinions of people who have a financial interest in the sale of your home. Every home should be valued before being sold.
Once you have a valuation - and you are aware of all the mistakes you must avoid - you are ready to select your agent.