for the tf2 farmers out there.... why the boom in price?

L4D3 confirmed?

What boom in price? Elli's cap price is currently 1.33 - 1.66 ref which is a normal price for a common hat. Actually, the hat is been hard to sell for quite a while, there's even an active suggestion on backpack.tf for lowering the price at 1.33 ref, which is probably going to pass.

Valve has buffed elli's caps so that anyone that wears it will become 0.00000001% more pro at tf2.

There's a box wich can only be crafted with hats, that's why almost every hat's price is going up. The Ellis Cap is a "random craft hat" so it's worth 1.33 or more.