I'm very pleased to see such an act even though I'm not playing in your server. (I'm in Karnak)

And yes, we also have the problem of sellers setting prices which the players who use that gear/material at the specific rank cannot afford. Some are even ridiculously priced which is more expensive than NPC selling price.
In short, new players in our server will have to complete leves at least for 20 times to buy an single item, in case that he/she doesn't sell anything.

I'll certainly join this act if you're planning to make it game-wide.
I have every DoH classes except armoror at 31-40, DoHs at 40+

And my general rule for setting price for gears is level x 1000 of the item.