75937563748 If they don't buy their own stock, they have friends who can help them buy out with those "Buy one get 4 free" type of deals. XD
Also, you're not the first person who has tried to make an impact on shops like this. It's happened a couple of times over the years. Sadly, it's never worked. :/ The only time stock has been unbought was when it's posted at a high price minutes before the deadline. XD