Some vendors in PoK don't even sell their basic tradeskill items anymore, and this happened right after the rollback on Wednesday. The more useful thing about them was as if a "snapshot" of their goods were made so they even sold infinite supply of certain tradeskill ingredients that are otherwise mob drops or player made. Some vendors sell just junk like runes, others sell one or two pieces of cloth armor and that's it. The vendor that sold grow potions doesn't sell them anymore... I am teh sad.
I literally had brewing over 200 and was about to buy goblin bones (Mirao Frostpouch) so I could start making tempers to raise my smithing, but the rollback somehow removed them from his inventory. Now I don't know how to raise my smithing beyond 115. >_< Kinda stumped at how to raise some skills now. Any ideas? O_o