BS SSJ4 Gogeta rates

The drops for Gogeta legitimately make no sense. I had 400 stones save up before hand and bought another 300 with no Gogeta in sight, while Ive seen so may others get him multiple times with less than 200 stones. It makes no sense whatsoever.

McLovin9174 about DRAGON BALL Z DOKKAN BATTLE, v3.3.0