If and endgame player does this it would costs him ~3billion silver, but even a centaur grinder would lose around 1B druing this time.
You better just put up a po and wait. Eventually they hype ends and the prices will go back where they was.
Another suggestion, do fieldbosses, if you dont afk you will get them quite "often".
I got 3/7 bhegs I only started doing them cuz of the 10% item rate, wish it was 10h, cuz sometimes it ends right when no bosses will spawn for the next 24h or even more.
Flawed concept, you only get 1 Crystal for a mediah quest run, not 2