Like bees with flowers, we are drawn to reliable signals of honest intent, and we choose to do business where those signals are found. This explains why we generally buy televisions from shops rather than from strangers on the street – the shop has invested in stock, it has a stable location and it is vulnerable to reputational damage. We do this instinctively; what we are prepared to pay for something is affected not only by the item itself but by the trustworthiness and reputation of the person selling it.