What to stock up on?

Anyone wanna tell me what the Dark Crystal market looks like in post-Item Maker versions?

I just bought a high grade dark crystal yesterday for 30m. haven't seen any other than that one, but I assume it's staying around that price.

This.

Also guys, don't stock up on plates, stock up on jewels. Plates do not add to the weapon's stats, and cannot be graded. They'll barely inflate whereas high grade crystals will inflate like there is no tomorrow.

plates are needed as the base to create weapons. adamantium is used on high leveled weapons.