The good items sell because the good items are good? If an item has limited or no use, it's going to drop in value because less people will want to pay for it. Unless new uses are found for old items, which is definitely possible and depends on what item people want and what items people make popular, then the less used items are going to fall in price, regardless of material cost.

DeckardCain, your post seems to be saying that you're disappointed that the market being moved by the invisible hand. Make a publicity video, showing people how you can solo Vanaduke with less commonly used gear. Then sell that gear. Then profit.

Leviathan is one of the more balanced blades and easier to access. Grinding Jelly King runs ad nauseam is going to enamor many to their new DA despite efforts to balance (aka: NERF) the blade by developers. Personally, I love the stylish look of CIV, DA, and Win; love the pack of wolvers that come with Wild Hunting Blade; love the way Lev handles; love the wicked look of Dread Vile Striker.

I also have different types of armor to handle assorted situations in addition to costume armor.

I do have people wanting normals because they can't afford UVs which I think I am selling cheaply. The economy and demographics of the player base is such that some people may get disappointed if I don't sell something at a loss. Some of the UVs I raise are sold before I even get a chance to put it up for sale on the forum. Repeat customers will send me tells asking if I have anything cool they might want as soon as I login. I will refer to other crafters if I don't carry something they want ASAP. The game is expanding so fast with new and veteran players that I am glad there is competition so I can bind an item for personal use once it reaches 5 stars for a change.