Right now it's impossible to add items to shopping cart if they cost less than 5$. That's make no sense, the minimum price to add an item to the cart should be 0.01$, to ensure that there's an actual price more than 0$, and because they're many items that may cost 1$, 2$, 1,15$, etc, and if you want to buy 20 items that cost 2$ that's a total of 40$ amount on cart, and you should be allow to make a purchase of an item, not matter its price!