Well.."Selling for what they want" sure..

Item - 20,000 listed 7 times, chances are the item has a 20k market price..being competitive would be dropping it no more than 500g, since you're trying to offer it slightly cheaper..but when it goes from 20k > 2k because of trying to sell first, competition is over and you're just hurting yourself lol.

Sadly, people are smart enough to not undercut tome mats into oblivion.