I am currently unsure what I should be doing in preperation for Cata. The main thing I'm wondering is whether I should be stockpiling glyphs and ink of the sea for after launch, or whether I should be unloading right now.
I'm assuming the new herbs will create some new ink, but I don't know how trading inks will work. Right now northrend herbs give Ink of the Sea, which you can trade one to one for any other ink. Right now I figure an average stack of northrend herbs can create about 2 glyphs (on average) at 18-23g a stack or so (recent prices on my server). I figure when Cata hits and the new herbs start hitting the AH they'll be in the hundreds of gold. I'll use them to level, and make the new glyphs I learn post-launch, which I'll sell for a premium, but I don't want to be using those herbs to create everyday glyphs if I can avoid it since they're so expensive.
So the question is, do I go into Cata strong with like 10 of every glyph and even more of the best ones? Or try to sell off right now and ease my way out of the market before the expansion hits. I have no idea how they'll treat our current stockpiles of glyphs, or how Ink of the Sea will continue to work/trade once the patch hits.