Proof below (3 sales).

Sales:

http://www.tf2outpost.com/trade/14667650

-b/o 2.3 buds, 2.5 buds in unusuals

-seems to have sold for smoking dragonborn+flies softcap seen here: http://www.tf2outpost.com/trade/14740168

-~2.2 buds

http://www.tf2outpost.com/trade/14545165

-b/o 2.3 buds

-sold for bubbling vrh+bubbling dragonborn=~1.8 buds

http://www.tf2outpost.com/trade/14530316

-sold for stormy tin gallon (unpriced)+sweets

http://www.tf2outpost.com/trade/14076589

-wanted 2.5 buds

-seems to have sold for of cranium (unpriced)

http://www.tf2outpost.com/trade/13299233

-bought hat of cards for 2.3 buds

Current trades:

http://www.tf2outpost.com/trade/14836543

-b/o 2.5 buds

Sales: 1.8, 2.2, 2.3

High end is from the sale at 2.3 buds with a few b/os there while low end is from the sale at 1.8.