Chest-only or key-only bundles?

It's possible to buy one chest or key at a time, or a bundle of chests with keys. As far as I can tell, there's no way to buy several chests or keys at once for a cheaper price. Is this correct?

If so, I humbly suggest that chest-only and key-only bundles be introduced. I have 32 keys stashed and I'm not good enough with enough different champs to earn enough chests through S-level games to use them. But I also have no reason to buy chests with keys included. I doubt I'm the only one with a key overload, and I know plenty of people have a bunch of chests without keys.

This seems like an easy sale...