New Idea for Hextech Crafting

So I just have a small idea that may be very useful for players if it were added in the game. I think it'd be nice to be able to buy key fragments for RP. I was thinking around the range of 45-50 RP per fragment. This would be very useful because I know how annoying it is to be stuck with 2 key fragments and trying so hard to get that last fragment, but, you don't have the RP to buy a full key. This was just an idea that I've been thinking about for a while. Thanks for reading!