I do not understand your first point. I don't collect common Cats Eyes, so I do not have a comparative example to post. If anyone disagrees with my (or any one else's) price estimate, they can, of course, extend the OP a monetary offer. Money talks. An offer beats an estimate. Offer the OP $100 for the pictured Cat's Eyes.
Some members post countless threads here. My opinion on that is irrelevant. I follow my own compass and standards developed for 3+ decades. There is a fair amount of self-promotion here. That is not my style. To each their own.
Over the years I have historically posted a fair number of photos of what I collect. Little mystery there. The Search function here works. I also own significant amounts that I do not share and never have. I have no motivation to.
Your latter opinion is just that.