The period of inflation is probably no long-term economy of WOW GOLD. This is simply because the players are not going to keep saving. Once the initial period of the extreme end of spending perhaps 12 weeks, prices should fall further down into "normal." However, I would say the first 3 months of the launch will be marked by abnormally high prices, even beyond what we have seen in previous expansions.
Even after the initial rise in inflation is likely to exceed the average inflation remains static over the next expansion. The incredibly high money supply combined with a substantial increase in the amount of wow gold from the missions should consolidate a period of high inflation after the launch of Taste. That said, not everything is bad, but it is important not to panic buy inflation.