Customers are irrational and I love it...
For example: No surprise, but Free wins out over an outstanding deal that requires a small payment.
"If you recall, in one trial of one study we offered students a Lindt Truffle for 26 cents and a Hershey's Kiss for 1 cent and observed the buying behavior: 40 percent went with the truffle and 40 percent with the Kiss. When we dropped the price of both chocolates by just 1 cent, we observed that suddenly 90 percent of participants opted for the free Kiss, even though the relative price between the two was the same. We concluded that FREE! is indeed a very powerful force"
Price is just one irrational factor, he has many more. Very good reading for a marketer.
Success consists of going from failure to failure without loss of enthusiasm. -Winston Churchill