4 month old price:

CLEAN SALES

http://www.tf2outpost.com/trade/18041351 3 days ago

pe milkman and vivid drills ~6.3

http://www.tf2outpost.com/trade/17793549 1 week ago

Sold for 6 pure

http://www.tf2outpost.com/trade/17695571 2 weeks ago

Sold for 132 keys = ~6.8 buds

Buyer had 115 keys, http://backpack.tf/id/76561198015874910?time=1391068800

then sold one of his hats for 17 keys: http://www.tf2outpost.com/trade/17726169 SOLD for 17 keys

Then bought the chieftain: http://backpack.tf/id/76561198015874910?time=1391414400

MASS DUPES

http://www.tf2outpost.com/trade/18086099 (mass duped)

Bought for ~5 pure it appears

B: http://backpack.tf/id/76561198058704780?time=1392710400

http://backpack.tf/id/76561198025278112?time=1392710400

A: http://backpack.tf/id/76561198058704780?time=1392796800

http://backpack.tf/id/76561198025278112?time=1392796800

http://www.tf2outpost.com/trade/18047267 (mass duped)

Appears to have sold for Scorching bonnet + 1 bud, but can't tell for sure.

http://backpack.tf/item/452298107 (hat)

http://backpack.tf/item/91856927 (bud)

http://www.tf2outpost.com/trade/17152568

Sold for 5 buds and 5 keys ~5.3

B: http://backpack.tf/id/76561198035664616?time=1392537600

A: http://backpack.tf/id/76561198035664616?time=1392624000

So based on the only 3 clean sales i could find.