Low-tiers are still painful to do, but... at least they are easy

Sale 1

http://www.tf2outpost.com/trade/24161059 Sold for a SF Minigun

X = 1.4*0.9

X = 1.3

Minigun http://backpack.tf/item/610034476

Whoopee http://backpack.tf/item/1020705961

Sale 2

http://www.tf2outpost.com/trade/24112356 Sold for OF Capotain

X = 1*0.9

X = 0.9

Capotain http://backpack.tf/item/1606969132

Whoopee http://backpack.tf/item/1020705961

Mini for Capotain

http://www.tf2outpost.com/trade/24036216 Sold for Disco Ketche

X = 1.1*0.9

X = 1

Ketche http://backpack.tf/item/3201860574

Capotain http://backpack.tf/item/1606969132

Sale 3

http://www.tf2outpost.com/trade/24211492 Sold with 3 keys pure for Flies Larrikin

Whoopee offered on Larrikin

X + 0.3 = 1.8

X = 1.5

Key 1http://backpack.tf/item/2913127325

Key 2 http://backpack.tf/item/3086012940

Key 3 http://backpack.tf/item/2891889033

Larrikin http://backpack.tf/item/222177898

Whoopee http://backpack.tf/item/1611218163

Mini for Larrikin

[No OP Trade] Sold for Blizz Strontium

Larrikin had no trade, presuming offered

X = 1.8

Strontium http://backpack.tf/item/2488339500

Larrikin http://backpack.tf/item/314879836

Sale 4

[No OP Trade]Sold for Bubbling Gentleman's Ushanka

X = 1.4*0.9

X = 1.3

Ushanka http://backpack.tf/item/1594501468

Whoopee http://backpack.tf/item/1360899817

0.9 deemed an Outlier.