Apparently I didn't need the Bubbling Noble suggestion

Oh well, free update I guess

Sale 1 BULK

http://backpack.tf/profiles/76561198056189244?time=1448352000&compare=1448438400 Sold for billions of keys Bulk for Billions of Keys

X = 1,000,000,000

Sale 2

http://www.tf2outpost.com/trade/27460849 Sold for 18 keys

B/O for Spartan was 18

X = 18

Spartan http://backpack.tf/item/272535722

Keys https://gyazo.com/e40bacae40a29f9445a5d9b0d7de1a0c http://backpack.tf/profiles/76561197980709148?time=1448524800&compare=1448611200

Sale 3

http://www.tf2outpost.com/trade/27349379 Sold with 2 keys + 3.7 keys of sweets for Spec KS Aussie Wrench

Presumed Spartan was offered

B/O for Spartan was 19.5

B/O for Wrench was 29.5

X + 2 + 3.7 = 22.9

X = 17

Wrench http://backpack.tf/item/2691925957

Stuff http://backpack.tf/profiles/76561198179992302?time=1446969600&compare=1446883200

Spartan http://backpack.tf/item/272535722

Mini for Wrench

http://steamcommunity.com/market/listings/440/Strange%20Specialized%20Killstreak%20Australium%20Wrench Sold for 58.90 on Nov 8th

58.9 + 58.9/1.15 = 110.12

110.12/2 = 55.06

Keys were $2.40 at time of sale

55.06/2.40 = 22.9 keys

Sale 4 QUICKSELL

http://backpack.tf/profiles/76561198062157703?time=1449388800&compare=1449302400 QuickSold for 13 pure + Zoomin' Broom

Comes to ~15

Sale 5

http://www.tf2outpost.com/trade/27527469 Sold for OF Milkman

B/O for Milk was 19

Defiant had no trade, presuming offered

X = 19

Milk http://backpack.tf/item/998393915

Defiant http://backpack.tf/item/474359891