Riot | Champion Shop Suggestion

I don't think Riot does this, but I feel that instead of making champions at fixed prices (450/1350/3150/4800/6300) - they should be based on the percentage of the community that uses them and buys them. The more who use/buy them, the champion's winrate, the amount S grades they get, should all be a factor in how much that champion should cost.

Thoughts?