A problem also is that there would probably be people who will buy on such high or insane prices. I see on Discogs the Caligula031 has already been sold for 45, so the seller said "Let's see if there is anyone more rich out there" . If he was left with all the stuff unsold for months, years, the prices would be more reasonable at the end.
Buying stuff only to resell it multiple times higher, is fucking disgusting. Cause he takes the copy of someone who really wanted it but for whatever reason couldn't buy it on time.
Nothing against selling good, rare, used, out of print releases with some profit or according to a reasonable estimation of their current "market price" . Money is the reason someone sells a release he likes or is willing to separate with one that has became rare. But the i buy just to resell tactic is parasitical.