Choo Choo.

Sale 1

http://www.tf2outpost.com/trade/24688593 Sold with 8 keys for C. Bubble Connoisseur's Cap

B/O for Helm was 4

B/O for Connoisseur's was 4

X + 0.6 = 3.15*0.9

X = 2.2

Cap http://backpack.tf/item/560119197

Helm http://backpack.tf/item/3182217738

Keys http://gyazo.com/4efed31f96a3e038ada9e4aec51452ec

Sale 2

http://www.tf2outpost.com/trade/24408639 Sold for C. Bubbles Fez + 1 key pure + .5 keys in sweets (Was unbumped for a week)

B/O for Helm was 4

B/O for Fez was 3

X = 2.5*0.9 + 0.1 + .5*0.9

X = 2.8

Fez http://backpack.tf/item/546794470

Sweets http://gyazo.com/a04425bde89fdd6f0cb1cc1630180cba

Helm http://backpack.tf/item/3182217738

Mini for Fez

'Quickseller' on the market for 30 keys, using 30 (2.5)

2.5 is more suitable as this one is selling for 3 http://www.tf2outpost.com/trade/25165743 , and has been unsuccessful for a week