GE Mask.

Sale 0:

http://backpack.tf/profiles/76561198048498731#!/compare/1435993200/1436079600

Just showing off :^)

Was over a year ago

Sale 1:

http://backpack.tf/profiles/76561198058566047#!/compare/1461801600/1461888000

http://www.tf2outpost.com/trade/27971715

145 pure

Sale 2:

http://backpack.tf/profiles/76561197970891690#!/compare/1457251200/1457596800

Scorching Tower + 5 keys

http://www.tf2outpost.com/trade/27875134 Caps at 150 b/o

Sale 3:

http://backpack.tf/profiles/76561198112861807#!/compare/1459296000/1459382400

Burning Merry

http://www.tf2outpost.com/trade/28011210 Looks like 140 b/o

Sale 4:

http://backpack.tf/profiles/76561198085861958#!/compare/1461628800/1461715200

Beams Honchos + GGJR Whopee + ProKS Aussie BB + 3 keys

106 + 27 + 31 + 3 = 167

http://www.tf2outpost.com/trade/28087056

Easily capped by 150 b/o

Honchos Mini:

http://backpack.tf/profiles/76561198120147285#!/compare/1456387200/1456473600

35 + scatter

71 + 35 = 106

Scatter mini:

http://steamcommunity.com/market/listings/440/Strange%20Professional%20Killstreak%20Current%20Event%20Scattergun%20%28Factory%20New%29

Recent sales:

$178

http://i.oddball.tf/R7oom.png

$180

http://i.oddball.tf/7NYWF.png

Avg is 179

/ 2.5 = 71

Sale 5:

http://backpack.tf/profiles/76561198109514211#!/compare/1456560000/1456819200

Knife Bicorne + c9 tree + D@D drill hat + sweets

Had no b/o

60 + 27 + 61 = 148

Bicorne Mini:

http://backpack.tf/profiles/76561198057348609#!/compare/1459036800/1459296000

~60

I'll use 140 - 150 here.