As some have suggested the price could go up because fewer people will be bringing the raw mats into the market, most will be busy leveling in Draenor, and perhaps there's the potential of a slight demand due to being able to herb while mounted - a plus since no flying allowed?

I'd probably buy and keep a couple of those on me as potential investments to flip during the WoD launch. It's risky, but 12k is such a small amount that you might as well try it.