Do you know If there will be any Be quiet discounts?
Eventually, maybe. But Be Quiet! is known to make good products and i haven't seen their products on sale, for people to buy them. So, i don't think that specific case goes on sale either. More likely the stock is bought out before that happens.
This is so with all quality products though. Only the lesser quality stuff, that no-one wants, is put usually on sale, so that store can get some money from those. Not sure if you've watched latest hardware news, but RTX 4090 was sold out on day 1. But RTX 4080 wasn't. And now, GPU scalpers are taking a hit, since no-one really wants to buy RTX 4080, close to the price of RTX 4090.