Instant Max Level

I just donated a few days ago, and was wondering how do you obtain your instant max level character. I tried using the store, but it seems you need to have 20 coins instead of 10. Am i missing something, or is the minimum donation 20 coins for the max level.

thanks for the help

It's 20. While you're at it, you might consider getting 30 coins.
Why? Character trade. These characters usually comes with 2 maxed/near max professions, BoE items, mounts, so you don't have to spend awful amount of time obtaining them.