Mastery Costs 3250 BE for 6 and 3900 BE for 7???

After working so hard to master a champion and getting 3 S's, I have to pay 3900 blue essence - which is about how much I earn after leveling three times. Is that not insane? I am good at the champ, why should I have to give even more to show that I'm good. It's an emote for Christ's sake. Anyone else have a problem here?
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