Pretty much all the recent proof I could find.

Not much of a median price change, but the many buyouts of 4.5 should get rid of the top range.

Sold:

http://www.tf2outpost.com/trade/10093721

B/O: 4 buds

Persumably sold for 4 buds.

http://www.tf2outpost.com/trade/10070862

B/O: 4.5

Persumably sold for 4.5 buds.

Selling:

http://www.tf2outpost.com/trade/10318563

B/O: 4.5

No notable offers

http://www.tf2outpost.com/trade/10268057

http://www.tf2outpost.com/trade/10310309

(~4.03 with overpay) 15 keys + 3 painted bills (24) + White bills (10) + Gold Scatter (Just going to assume lower one, 4) + Storm Hermes (1.8 buds)

http://www.tf2outpost.com/trade/10206809

B/O: 4.5

No notable offers