The Whiptail glitch probably accounted for a huge increase in the number of active herbers, leading to a huge surplus of V-life.
Even though its been corrected, I'm still seeing lots of cheap v-life and whiptail stacks. I've spent about 150k in the last week , just on those two items.
I saw the same thing: price of V.Lifes went from 9-11 gold pre-4.0.6, to 20-25 gold on day of release, to 10-12 gold now. Waiting for the surplus to dry up.
Was going to whine about spending 25K or so snapping up even more Volatiles (rather than my preferred selling off of my current stock) ; but, seeing your post, will just keep quiet. Sitting on about 3000 V.Lifes, now, and waiting for the rebound...