Cosy, the links are good, but the market has changed greatly in the past 4 years. The player activity is playing a huge role here. As I see it, the less players will be playing, the higher the cost of ectos. Previously considered rare skins like elemental sword, raven staff etc. is selling for cents, where the very rare (like frog, bds) will stay as they are and the legendary items like crystaline sword will only increase in price. Some are overarmed and some are simply not dropping enough anymore. Thus the ectos will be more expensive, since you will need much more to begin trading with. Of course there is a different market for consumables, but I believe that that is very closely related to the amount of speed clears done. And the less speed clears are being done, the less of the cons will be on the market and the more their price will increase. <- this is all just my observation of the guild wars trade in the past couple of years. But what I am really interested whether it is true, that the ecto price will only rise.
In one of the previous links some guy mentioned that the ecto price is going down before some major events when players want some more liquidity for the tickets or other stuff. However, I kinda don't see that happening anymore as well, as everyone is getting an overkill of gold from zaishen quests.