People should stop making comments complaining about undercutting, it's just supply and demand. It just so happens the supply went up after the assault/salvage exploit fix
@Tidis the markup is because of the fact that this synth utilizes Imperial Tea Leaves, not Windurstian Tea Leaves. Imp. Leaves are notoriously tedious to obtain in sufficient number, and if you study the sale history, rarely more than a stack of these are HELMed a day on phoenix. Rare ingredients, for a bulk use (lvl 75~ synth) item dictates that the price will be astronomical. So QQ.
When buying stacks of this you are paying mostly for the person to have stacks them all for you. It can often be cheaper just to buy them in singles and stack them yourself.