My first suggestion in ages.

Sales

http://www.tf2outpost.com/trade/23840996 - sold for KaW muffs (5.25 * 0.9 = 4.7) + STB Eliminator (can't find any sales) + another hat which I forgot.

http://www.tf2outpost.com/trade/23161026 - sold for cauldron bubbles cannonball (16.5 * 0.9) ~ 14.9, rounding to 15

http://www.tf2outpost.com/trade/23028998 - sold along with bubbles polar (10.7) for arcana bonk boy (seller at 20 * 0.9 = 18) + TaW danger (2.7) + GBH capo (5.5) ~ 15.5

Mini for Danger

http://www.tf2outpost.com/trade/22874502 - sold for MN modest (3 * 0.9) ~ 2.7

Mini for Capo

http://www.tf2outpost.com/trade/23177652 - sold for holy grail rancho (6.1 * 0.9) ~ 5.5