Literally everyone is selling it for less then 4 buds, no joke. Not one on outpost (that isn't sold) is going for 4 buds.

Sellers @ 3 buds

http://www.tf2outpost.com/trade/19697112 (3 buds, up for 3 days)

http://www.tf2outpost.com/trade/19671585 (2.5 buds or 3 buds in unusuals)

Solds @ 3.5 buds or less

http://www.tf2outpost.com/trade/19285933 (2 buds but quicksale)

https://imgbomb.com/i/?SUjVg (went for aces high front runner + smoking familiar fez, around 3.3 buds)

http://www.tf2outpost.com/trade/19624323 (66 keys, aka 3.4 buds up for 1 week)

http://www.tf2outpost.com/trade/19315948 (sold for aces high cannon ball 1:1, worth 3.5)