The other day, Linda, the real-estate agent whom my wife and I used to buy our home, called me out of the blue. Real-estate agents, like doctors, are the friendly, knowledgeable face of a bewildering, price-gouging system. If Americans paid the same rate as the British, they would save more than $72 billion a year in real-estate commissions. The potential for big money, in turn, has led more and more Americans to become real-estate agents. Every dollar that is paid out in a real-estate transaction — to sellers, agents, inspectors, insurers, and the IRS — comes from you, the buyer.

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