What will you do if a potential buyer makes a "full price offer?" A listing agreement is a binding contract between you and the agent's broker. If they are able to produce a buyer, ready willing, and able to purchase the property for the agreed upon terms, at the very least you would be responsible for paying the agency's commission and possibly loss and damages to the buyer.
Determining a realistic market price is one of the many services provided by real estate professionals. Asking for a free "comparative market analysis" should provide you with the information you require.
In the event you do not want to go the realtor route, you can always hire a professional appraiser and have an appraisal done.
It's not advised to put the home on the market "just for the fun of it"....there could be serious risks involved.
If you want to find out what your house is worth get a complimentary Comparative Market Analysis (CMA) or pay an Appraiser to give you a price range. Having your home on display and people traipsing through is a pain. If you want to sell your house you must commit to selling. The glass is either full or empty...not half glassed.
The problem with a seller putting a house on the market with an agent to see how much a buyer will pay, is putting the seller in a liable situation. If the buyer says "yes, I will pay that," then the seller is going to be liable for commissions on both sides of the transaction, even if the sale does not go through. Consequently, the buyer will have legal recourse to go after the seller for any out-of-pocket costs as well as vulnerability to a law suit for specific performance.
As a home seller, no one actually HAS to sell, although it seems to me a lot of work to do it and not have the intention to sell.
I would suggest having a few agents do a markety analysis on your property to see what they say your property will sell for. As agents, we study comparisons and give you a very good idea of what your home will sell for in todays market. Then, if you are happy with what you hear, you can make the decision to list or not list.