Why is Pokemon XY Premium champion booster box so expensive

Why is Pokemon XY Premium champion booster box so expensive But their single cards are not really expensive?

Is there a sought out card? Is it because there are gaurantee ultras and all cards are holo in each lack? Or was the print run really limited?

The dark shine to their cards are really cool, dont know why their singles didnt do better tbh

I still see a fair premium on these cards as singles, and I’m confident that what you would open would bring a fair price compared to what it cost to open the sealed box.

I think the value lies in scarcity. These boxes had lots of playable cards which meant they were opened and I’m not really sure a lot of people kept some sealed. I could be wrong though.

Because trainers are expensive in Japan. Tons of cards stores can get ¥100-¥900 per card for, and they are the quick selling meta cards.