The LoL store App

So, I know that a lot of ideas have been put up for a League of Legends App, but all I want is an app like the Steam Marketplace. I was sitting in my OChem class, and saw that the new Vlad skin was out, and wanted to buy it, but I couldn't! I had to wait like a normal human being until I got home. Then it struck me! RIOT! Y U NO MAKE MARKETPLACE APP!?! How hard would it be, you know? Sign into your summoner account, and buy a skin on the fly, or get some new rune pages, or something to that effect. So? Am I crazy, or is this actually a good idea?