Well, I'm not sure. You'd know better than me, if you're dealing with the same people. Are you selling on CL, eBay, or Reverb? Or somewhere else? But no one's ever told me I should come down on my Ludwig 3 ply 14x14 'cause a (enter brand here) costs less and sounds just as good. That's a new one. Maybe you got something different in your water, where you are.
I've been playing the buy/sell game for about 20 years now (eBay) .... so I pretty much know the local L.A./Southern California buyer/sellers .... and over the years, I've come to know some of the more "notorious" on line sellers elsewhere, as well.
It's a pretty mixed bag, out there, from what I've experienced. Some cats know the value of something and are respectful ..... and others aren't and don't have a clue.
One guy (San Diego based) has a really, REALLY, bad rep. He'll be one of the first to tell you your $1500 kit's only worth $1000 .... and on the other hand, he's currently selling a 18x12 Rogers kick, for $4500. To his credit, he did start at $5000. He keeps dropping his price, he'll eventually find a buyer. It's just the nature of the beast, or at least the nature of SOME beasts.
And so it goes. I don't know what you're selling. I don't know what you're asking. Maybe you are too high. Time will tell.
And while it might be a little frustrating in the moment, dealing with a chucklehead ...... it usually makes for a good story on the other end.