Interesting graph - http://2dboy.com/blog/wp-content/uploads/2009/10/histogram.png http://2dboy.com/blog/wp-content/uploads/2009/10/histogram.p... Observe skew

Interesting graph - http://2dboy.com/blog/wp-content/uploads/2009/10/histogram.png http://2dboy.com/blog/wp-content/uploads/2009/10/histogram.p... Observe skews at multiples of $5 - 5, 10, 15, 20 These tell you how people look for easy anchors to decide pricing. When there is no guidance, easy to think of $5 than $6.21