Counter!

Sale 1

http://www.tf2outpost.com/trade/23688164 Sold for 2 buds + 1 gifted bud (In trade comments)

X + 7 = 2 + 1 (Gifted Bud)

X + 0.5 = 3

X = 2.5

Coupe http://backpack.tf/item/232213294

Mini for Gifted Bud

http://www.tf2outpost.com/trade/23688164 Sold said Gifted Bud for 15 keys (in trade comments)

X = 15 keys/1 bud

Sale 2 Ambiguous

http://www.tf2outpost.com/trade/23482263 Sold for Spec KS SF Scattergun

X = 2.7*0.9

X = 2.4

Scattergun http://backpack.tf/item/632500810

Coupe http://backpack.tf/item/232213294

Sale 3

Sold for 40 keys + Killstreak Bat Kit + Killstreak Direct Hit Kit + Killstreak Sniper Rifle Kit + Black Fast Learner + Name Tag

(Credits to person who gave sale in Other suggestion)

X = 2.6 + 2 keys*0.9

X = 0.1 + 2.6

X = 2.7

http://puu.sh/dmoih/b33cdde5ba.png

http://puu.sh/dmogp/fe80f47ed3.png

Sale 4

Sold for Bubbling Team Captain (3.3) with 1.5 keys = 3

- http://i.gyazo.com/497ac64b96de8e23fa2b8806b9bf2dc0.png

http://i.gyazo.com/9fa1be7538433dca4a7c6f30d42259bd.png

http://gyazo.com/cefe7fa092493fc187162173e0843fdd

Would come to 3 as B/O was 3