Proof below.

Sales:

http://www.tf2outpost.com/trade/15199156

-b/o of 4 buds

-sold/bought for this c. bubbles aa: http://www.tf2outpost.com/trade/15293368

-~3.4 buds

http://www.tf2outpost.com/trade/15197513

-sold for stormy counter (#themed)=~2.6 buds in 2 hours, a bit quick to accept his offer and anything below 3 seems low for this hat

http://www.tf2outpost.com/trade/12775139

-sold for 3 buds

http://www.tf2outpost.com/trade/15567536

-wanted 4 buds

-bucket+1 bud bought terror lucky shot: http://www.tf2outpost.com/trade/14100288

-~3.2 buds, no overpay as offered

http://www.tf2outpost.com/trade/15497367

-b/o of 4 buds

-sold for blizz lucky shot+c9 hound dog (unpriced)

Current trades:

http://www.tf2outpost.com/trade/15343428

-b/o of 4 buds

-notable offers:

terror waxy (2.5)

smoking headsplitter+7 key sweets (3.4)

3 buds

http://www.tf2outpost.com/trade/15607859

-b/o of 4 buds

Sales: 2.6, 3, 3.2, 3.4

2.6 sale was in 2 hours and is the only sale below 3 so I'm not too sure setting it as low end. 3 buds comes from a sale and a pure offer. 3.4 is from a sale and an offer. Unusual overpay and original prices used.