I have been involved in sales most of my life and the difference is that I have never sold anything that I had to lie about.
A good salesman gives overall sales advice is confident about his product or service and leaves customers in a position to make an informed decision.
Estate agents work for both buyers and seller if not he is not worth his salt the object being to get the right price the seller wants and the right price being the the amount the buyer is willing to pay.
Happy estate agent as he is paid
YOU BROKER THE DEAL.