This all started as a game to price first unusual I saw on classifieds...

Sale 1

http://backpack.tf/profiles/76561198055622215?time=1424448959

Sold with aces high braniac for mallard tyrant, morning glory fish, and electrostatic barnstormer

x + 3.5 = (12.3 + 6.4 + 2.6) x 0.9

x + 3.5 = 19.2

x = 15.7

Sale 2

http://backpack.tf/profiles/76561198122976167?time=1424052308

Sold for secret to everybody YWN

15.2 x 0.9 = 13.7

Mini on duck tyrants

http://backpack.tf/profiles/76561197995194055?time=1418532335

Sold with circling heart milkman for scorching bone dome

x + 4 = (11.5 x 0.9)

x+ 4 = 10.4

x = 6.4

Mini on barn stormer

http://backpack.tf/profiles/76561198055729118?time=1424477345

Sold for smoking little buddy + circling heart safe

(1.1 + 1.8) x 0.9 = x

2.6 = x

Feedback appreciated!