http://www.tf2outpost.com/trade/7973804 - b/o 1 bud.

http://www.tf2outpost.com/trade/7860632 - but sold for these two things? (19 in items max)

http://www.tf2outpost.com/trade/8336897 - "sold for 1 bud I added 2 keys"

http://www.tf2outpost.com/trade/8223007 - b/o 1 bud sold in a deal for misty beret

http://www.tf2outpost.com/trade/8220168 - sold for blizz bucket it seems (1.1 in unusuals, outdated)

http://www.tf2outpost.com/trade/7587017 - offers:

"pink bubbles german gonzila" (20 keys unusuals, outdated)

"Unusual Scotch Bonnet w/ Circling Peace Sign" (.9 unsuuals outadted)

"19 keys, a SF Amby and a 2012 normal Festive set." (bud in items/ mixed)

Conclusion: plenty of 1 bud b/os so high end needs to be no higher than 27. Sales and offers are very rare on this hat, sort of a cancer. Small lower of the high end to match numerous b/os, Bud item/mixed offer counter as 1 key overpay/outlier and 19 key item offer regarded as outlier.