Quote from Ryude
Stock up on gold now, I have a feeling crafts and enchants won't be cheap in the expansion. With no AH to sell items for gold or buy gold, it will take a long time to farm gold. With that said, I'm going to stockpile as much as I can
Hopefully they'll increase the vendor prices of items, with white items being salvaged for components now they might slam a higher monetary value onto everything for the vendor. We'll see.
I will be stockpiling gold as well though. =)