Unpriced hat. It's not going for what the other suggestion says.

OFFERS:

http://www.tf2outpost.com/trade/9619779 - C/O of 6 buds - however, trade is new.

SALES:

http://www.tf2outpost.com/trade/9596420 = http://gyazo.com/8d3044b285dba0afcdc2490f4ca021c4: 13th Tippler's + 5 keys = Level 69 Earbuds (30 keys) + O. Fire KE (6 mixed, 10% reduction to the Tippler's as overpay is going in the other direction) = 13th Tippler's + 0.1. This brings the Tippler to about 6.5.

http://www.tf2outpost.com/trade/8650519 - Lantern Hoodie + Storm Ballcap + Storm Waxy Wayfinder - 8.1 unusual offer - accepted.

http://www.tf2outpost.com/trade/6280284 - Harvest Moon Capotain + Full SF 2012 Set (about 6 buds, accepted)

http://www.tf2outpost.com/trade/9014048 - Moon Stahl + 13th Tipplers = Scorching Noh, therefore 13th Tippler's = ~9.2

(SexySix) Big Sexy: i traded it for a burning beret and 7 keys

Full unedited chat: http://pastebin.com/T37YHEzq

~4 pure

With a data set of 6, 6, 6.5, 8.1, both the Scorching Noh and the Burning Beret deals are outliers by a margin of 0.5-2 buds. For the purpose of a range a bit more tight than one encompassing all sales, I'm cutting off the two outliers. This gives us a range of 6-8.1 buds. We have a sale and an offer at 6 to make the low end, a sale at 6.5 to prove the middle, and a sale at 8.1 to prove the high.

Thoughts, counterproof, etc? Post them, please.

Special thanks to Wolfi, RomanCenturion, Sollux ♊Mage of Doom♊, and (SexySix) Big Sexy for helping me collect and make sense of proof!