It makes me laugh when yesterday they sold a 7* plus more for $100, spent a week with 7* crystals in the store for 5k units, and now here we are with a $300, 11.5k unit valuation for a 7*. It's all over the place. Yes, different pools in all the crystals, and these should only be used for a top up...but still. If they didn't have the nonsense increase with each purchase 2500 units wouldn't be the worst, but still not worth it.
If I buy all 50 I'll have enough for a 7* crystal Hmm....maybe I'll dupe my Venom the Duck