Materials are extremely cheap and Umbril Ooze are more common(and more plentiful Umbril) in Cirdas Caverns. This will be plentiful for cheaper than 5M within a week.
Ugh. Leathercrafters are just eating you buyers up. They're taking a level 99 synth that only costs 200k to make, and charging literally 25x that for the HQ.
Thing is, I don't blame them for doing it. People are buying it. Why stop? Until people stop throwing gil around, this won't drop.
