Contextual pricing perhaps? Kind of akin to this: http://www.marketingwords.com/blog/psychology-pricing-products-services/ http://www.marketingwords.com/blog/

Contextual pricing perhaps? Kind of akin to this: http://www.marketingwords.com/blog/psychology-pricing-products-services/ http://www.marketingwords.com/blog/psychology-pricing-produc... Snippet from the classic experiment: For instance, a small popcorn would be $3.50. A medium-sized bucket of popcorn would be $7.50 and a large would cost $8.00. The mindset here is that “for only 50 cents more” you can get a much larger portion of popcorn. The same is true for fountain drinks at gas stations. Small = $.99. Medium = $1.49. Large = $1.59. Which sells more? Almost always the large for “just 10 cents more.”