I can actually give you a personal example of Zadeh making a win on a preorder price. I personally paid close to 500 for these
There was preorder that went around last summer. I don't follow the sacais much but my girl always wanted a pair. I was in the midst of a couple big flips from other side hustles and had money to blow. One day I caught the email and figured I'd save myself the headache of chasing it around release.
Of course the release comes and goes and I figure out that I paid way too much for these but a deal is a deal and I honor my deals so I just waited until her pair came and kept it pushing.
Although I never had intentions on becoming a bulk buyer I prefer not to burn bridges over pennies. Even if he sourced via stockX a week or two before sending to me he probably made 2-300 bucks.
I'd be willing to bet that happens more frequently than you think.
The moral of the story is you always take a chance when you price or purchase based on speculation.