I'm assuming you are a newborn Steam player. This exact same thing happened from when the game was in beta to when it went into full release. Small supply, big demand.

I told myself I wouldn't do this, but here's my take. I won't be offended if no one reads this, just wanted to send it out there.

The trick is.... Hoard all of your goodies and don't sell anything until a week after a bunch of new people join.

The reason is, the seasoned players will usually want to buy less and try to sell more than new players. The more time goes on without more new players joining, the higher the supply gets for these goods (because the experienced-player base will become more heavily weighted) , and the less the demand gets because anyone can just do a t3 run and get the mats they need.

When there is an influx of new players joining, then we see commodity prices jump and CE prices fall. This is because these new players will buy CE and trade it for crowns (lower the CE price) and attempt to buy goods on the Auction house (Increasing demand for these commodities).

We have seen examples of this when they posted an article on Yahoo about Spiral knights back in April, and now we are seeing it again with the influx of steam players.

This game is still young, and the market of the game will only balance with a steady influx of new players. Judging from the history so far of this game, it is here to stay and there is a lot in development. So, if you want to take advantage of the market fluctuations; simply put, buy low and sell high.