I'll start by asking if you actually sold any of these because it would be remarkable. Let's do some analysis on why:
First off, anyone dropping $50 on the game is already likely well established (meaning they are likely VIP 10+). Therefore, a handful of enchanting stones and a few million gold is meaningless. Which leaves us with the 45 stamina packs.
Ok. That's somewhat meaningful. Now math...
45 stamina packs x 60 energy = 2,700 energy
2,700 energy ÷ 7 energy per run = 385 runs
These folks have access to "raid 10" so if you assume it takes 5 mins to use all of your stamina packs (which is excessive), 4 mins to switch between items, and 1 minute to hit "raid 10" 38 times, your cost per hour to play this game works out to $300/hour or $7,200/day.
This exercise would net you between 1 and 7 purple or orange items depending on the drop rate.
Hey - at least throw the folks some free raid tickets.