[Infinite Derps]

That is NOT how economy works, it may work if you could only buy X amount of keys/week, but this is not the case, and even then the prices in the in store are completely static, and when dealing with a free "economy" (if you can even call it that) like TF2's where everyone sells what they have at the amount they want it makes it make EVEN LESS sense, people should just stick to the normal prices that are on the stores (multiplied times 1.5 for hats since they'd be clean) rather than make up their own prices based on highschool economy classes.

You are talking about the Valve TF2 store right?

In that case those prices were already invalid for a long time. People use unofficial prices now that are set by backpack.tf admins and voters.

Example: currently 1 ref is worth 0.31$-0.33$ in paypall.
This makes ref (which again, is really easy to obtain), a great sell on paypall, which people can use to buy mass amounts of keys.

It is really the people with 100's of accounts that hoard metal that ruined the economy. Valve key prices no longer matter.