That's impressive. Unfortunately the source* of theses number is not very clear on how many items has been sold and if people buy by unit or by pack. I would lo

That's impressive. Unfortunately the source* of theses number is not very clear on how many items has been sold and if people buy by unit or by pack. I would love to see more tests result like that. http://blog.gumroad.com/post/64417917582/a-penny-saved-psychological-pricing http://blog.gumroad.com/post/64417917582/a-penny-saved-psych...