Proof below.

Reconfirmation of original range.

Sales:

http://www.tf2outpost.com/trade/14921740

-hwah+2 keys, sold for this eerie stovepipe (buyer had a previous offer): http://www.tf2outpost.com/trade/15124788

-~2.6 buds

http://www.tf2outpost.com/trade/14850146

-bought sulphurous hwah+7 keys=~2.5 buds

http://www.tf2outpost.com/trade/14480608

-b/o of ~2.7 buds

-seems to have been sold/bought for ge capotain (was not outdated at time of sale)+s. birdman: http://www.tf2outpost.com/trade/14606955

-~2.1 buds

http://www.tf2outpost.com/trade/15191310

-b/o of 3 buds

-wanted soldier hats, seems to have bought this searing drill hat: http://www.tf2outpost.com/trade/14403489

-~2.3 buds

http://www.tf2outpost.com/trade/14469770

-seems to have quicksold for 37 keys=~1.8 buds, outlier

Current trades:

http://www.tf2outpost.com/trade/15240977

-b/o of 3.5 buds

-offer of stormy bonk (outdated)+2 buds but gathering, outlier looking at past b/os

Sales: 1.8, 2.1, 2.3, 2.6, 2.7

Low end from the 2.1 sale, high end from 2.7 sale and a b/o. Unusual overpay and original prices used