WoW.... Potions to help you level....

With the new expansion all but out, the time to sell items for a "good" price is nearly over.
I've never bought a power level token outside of getting one with a pre purchase of an expansion.
At least some of the potions that sold well can be used with alts for levelling up the last one or two to 100.
Better to use them than sell them for a crappy price.

http://www.wowhead.com/item=86574/elixir-of-ancient-knowledge

http://www.wowhead.com/item=128312/elixir-of-the-rapid-mind

http://www.wowhead.com/item=120182/excess-potion-of-accelerated-learning