Skis depreciate incredibly quickly when used and as their technology ages. Ski owners may not want to acknowledge that fact.
PT Barnum was right: there is a sucker born every minute. You may luck out and find the sucker. If not, you have to consider whether or not your price is realistic.
One of your example posts:
I have a pair of 2002 Salomon AK Rockets, like new. Green topsheet with orange bases, both in excellent condition. These are beastly big skis, made for steep and deep backcountry out west. 200cm. 118 tip, 88 waist, 110 tail. 24m radius. Complete with Salomon Equipe 900S 12DIN bindings on a Salomon SynchroCenter adjustible demo plate, so no need to re-drill! $150 cash.
IMHO, if anyone paid more than $75 dollars for them, they were a fool. Maybe you found a fool. Skis are way too old, length is way too long, and ski profile is way too out of date (width and rocker) for the type of skiing it would match. Bindings are the most valuable thing on those skis, but they are nearly 10 year old bindings.