I went through all the hats on outpost for this

EDIT: counter-suggestion

http://www.tf2outpost.com/trade/19633518 - 1.8 pure

http://www.tf2outpost.com/trade/18979715 - quicksold for 1 bud 5 keys

http://www.tf2outpost.com/trade/18464817 - Steaming Kabuto

~ 1.5 buds

http://www.tf2outpost.com/trade/19560325 - DP Tavish

~ 1.8 buds

http://www.tf2outpost.com/trade/19045987 - added OF Nappers and 6 keys for GE Bonnet

~ 1.5 buds (offered)

http://www.tf2outpost.com/trade/18905735 - S. Gunslinger + SF FJ

~ 1.5 buds

http://www.tf2outpost.com/trade/18821948 - quicksold for 30 keys (???)

http://www.tf2outpost.com/trade/18311105 - Aces Gonzilla

~ 1.7 buds

While 1.5 may be a quicksell, there are too many sales at that price for it not to be in range

I doubt anyone would have any concerns with this amount of proof