First off you definitely need to get rid of your snowfall ink before cataclysm.
Let's start off with a list of ways to sell the inks, these are always fun:
- Runescrolls of Fortitude
- Cards of the North (green at 462)
- Faces of Doom and Iron-Bound Tome
- Sell in raw form
Cards of the North should sell well and you can advertise that they will raise reputation with the darkmoon faire. Also, with the changes to stats in 4.0.1 many players would gladly take the greatness trinket over whatever they have now, unless of course they have some of the best trinkets in the game. If you saved up eternal lifes for the gem rush in 4.0.1 that never happened, well maybe you could afford to make some cards of the north one last time. If you want you could also save these cards to provide skill-ups at the start of cataclysm since they go green at 462.
The off hands sell less than they used to but don't give up on them entirely. Try to get rid of a handful of inks this way.
Selling off your snowfall in raw form at a deal is still something for your time. Diversify and sell off a good amount of your stock this way. Sell singles, stacks of 5 and also 20. Try not to flood too much and find a happy medium between your posting and the demand for them. Expect demand to shoot up during next week and into the following.
On the topic of inscription, I bet you that certificate of ownership will sell very well in cata with all the new pets people can acquire and wanting to rename them different things. If players can rename their water elementals and warlock pets (calling it now) then that would greatly expand the market for certificate of ownership. Also, expect to see lots of the Rituals of the New Moon appearing in trade chat during cataclysm. "Want to look like a worgen? Buy this off-hand and become one! Only 200g, PST ME!"