You're looking (and maybe selling) the wrong stuff: Cheap drops from monsters. I dont know either why people are bothering to out those on the marketboard...

But if you get into crafting you'll notice that the highlevel crafted gear and glamouritems (thats what you would be selling) are selling rather slow and that you have to adjust prices and such that having more than 40 up sounds like a pain to me... and I am a mastercrafter, selling my stuff slowly but steadly.