While you are probably correct in assuming many comsumer's WTP (and overall demand curve) shifts outward towards this time of year, my point is that, regardless of that effect, there would still be many units sold at an increased price simply because there were always consumers, who, at that higher price, would have gladly still purchased one. In the picture, this is represented by the green area, well actually, the distance from the vertical axis, to any point along the demand curve above the intersect. Those people have had NO preference change, yet have always been willing to purchase at higher prices than then current market. We assume people are rational, and generally, they are. Thus, the stupidity of these people should not be based on their purchasing of said wii.