Now that I can start suggesting prices on the higher level...(also this hat deserves much more than the lousy 2.5 bud price the spreadsheet algorithm gives it due to its only priced one being Bubbling for that much. :/)

When necessary, overpay is applied: ((High value + Low value) / 2) * 0.9, rounded up.

1. SOLD FOR KNIFESTORM MODEST PILE OF HAT = ~10.4 buds ( http://www.tf2outpost.com/item/440,2501635483,30109,5 , http://www.tf2outpost.com/item/440,2501635480,139,5 ) (George->oh hai thar coolname)

2. SOLD FOR CIRCLING HEART BONK BOY + O. FIRE LUCHADORE = ~10.9 buds ( http://www.tf2outpost.com/item/440,2404384736,30109,5 , http://www.tf2outpost.com/item/440,2406334318,451,5 , http://www.tf2outpost.com/item/440,2406334350,380,5 ) (Baer->o hai thar mr bucket)

Proving price of Luchadore (Four months outdated):

Sold for Blizzardy Kabuto = ~2.3 buds ( http://www.tf2outpost.com/item/440,2532144687,380,5 , http://www.tf2outpost.com/item/440,2501792220,152,5 ) (Spud->Burger)

Sold for A bud, white Bill's Hat, and an S. Merc's Muffler = ~1.7 buds ( http://www.tf2outpost.com/trade/18417172 , http://www.tf2outpost.com/item/440,2532144687,380,5 )

Sold for a Max Head = ~2.5 buds at the time ( http://www.tf2outpost.com/trade/17636760 )

Also sold for Circling Heart Hetman's Headpiece (~1.9 buds), however that price is outdated by four months as well.

Hopefully I did the ol' "prove-the-price" method right.