Answer: Estate agents who are knowledgeable about property play an important role in the property market and the buying and selling process.
Several expressions of interest suggest the house is desirable and presumably your mother would like to get the best price. If she does not put the property on the open market, she will not know if she has achieved this.
A reputable estate agent will advise on price and will negotiate with a buyer, can organise best and final offers or sealed bids, will discuss finances with a buyer and will usually ask for written evidence to confirm a buyer does actually have the funding to proceed. An agent will often chase up slow solicitors, assist with any general inquiries a buyer may have and may be able to resolve issues by renegotiating the price or arranging fair contributions between the buyer and seller for necessary works.
As a person's house is often their biggest asset, it is difficult for them to remain objective. Dealing directly with a buyer could be a very stressful experience for your mother, especially as she could be selling to a friend, and so it would seem a sensible option for her to instruct one of the agents who has provided her with a valuation.
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