Am I able to sell drops off of Princess or is that considered GDKP?

As the title says, I’m unclear whether or not I can sell princess runs to sell the ring at a fixed price? It’s not bidding and it’s not a raid. Did people get banned for selling WC pants runs?

But dungeon boosting is fine yeah? So can I just sell princess runs for a fixed amount and let people roll on whatever, that doesn’t count?

Seems like a weird gray area and I can’t seem to find the actual answer, because I see people selling items off her in chat all the time.