Yeah I was around for all yeezy drops as well. Everything started going crazy after Y2's, prices were shooting sky high. Doesn't mean they're being SOLD at the price that they are priced at. But average asking price is around the same. With these boosts though, its a huge standard deviation with pairs being sold at under $1k privately to the median of $1.5 average selling on ebay and outside market, to stores such as FC charging $2k with a pair or so being sold at that price. Though FC shouldn't be used as a resell price indicator, they do have some fairly normal resell prices and most do use it to get a ballpark of what they should pay.
as far as the ebay listings go, all those sitting at $1k are either new sellers or low feedback or sketchy listing/selling description. Some people already getting red flagged on these and not even looking anymore, hence the sit. But I'd say a average selling price is $1.2-1.5 right now. Not fair, but average.