Try before you buy

Riot we should make a game mode where you can try any champion before you buy them, like a custom match where you can change the settings and make all of the champions free to play. This game mode makes it so you cant gain any IP, XP, or RP from this game mode. I recently bought a champion that I thought was amazing when he/she was free for a week then I bought him and realized how bad he actually was. I wish I could have played him once more before I bought him. Unfortunately I can't return him because I used all of my return points to get him XD. Thats my opinion to help make this game just a little better, hopefully lots of people agree and are with me on this, and that Riot can make this happen.