Selling:

Classifieds: http://backpack.tf/classifieds?item=A%20Head%20Full%20of%20Hot%20Air&quality=5&tradable=1&craftable=1&australium=-1&particle=93

Screenshot(s) of Classifieds:

http://imgur.com/w9b3xSU

<Sellers>

13.58 keys | http://backpack.tf/item/4871984517 | http://backpack.tf/u/76561198064777353 | Listed about 15 hours ago

14 keys | http://backpack.tf/item/5582003340 | http://backpack.tf/u/76561198048008254 | Listed about 22 hours ago [Bumped]

15 keys | http://backpack.tf/item/4583756324 | http://backpack.tf/u/76561198309246958 | Listed 4 days ago [Bumped]

17 keys | http://backpack.tf/item/4357598288 | http://backpack.tf/u/76561198090956917 | Listed 2 months ago [Bumped]

18 keys | http://backpack.tf/item/4224619265 | http://backpack.tf/u/76561198119629032 | Listed 3 days ago [Bumped]

18 keys | http://backpack.tf/item/4350065606 | http://backpack.tf/u/76561197965601027 | Listed 19 days ago [Bumped]

18 keys | http://backpack.tf/item/4224306738 | http://backpack.tf/u/76561198050813027 | Listed 2 days ago [Bumped]

20 keys | http://backpack.tf/item/4686150923 | http://backpack.tf/u/76561198119563409 | Listed 3 days ago [Bumped]

20 keys | http://backpack.tf/item/4234770196 | http://backpack.tf/u/76561197993065940 | Listed 3 days ago

22 keys | http://backpack.tf/item/4269564889 | http://backpack.tf/u/76561198074924284 | Listed about a month ago [Bumped]

Sold:

http://backpack.tf/profiles/76561198134054821#!/compare/1488412800/1488585600 - sold for Spec KS Batsaber = 9 keys (low)

Credits to Eazy Peazy Squeezy Lemons

http://backpack.tf/profiles/76561198134054821#!/compare/1486684800/1486857600 - sold with a key for a Orbiting Fire Texas Tin-Gallon = 17 keys

Credits to Eazy Peazy Squeezy Lemons

http://backpack.tf/profiles/76561198150077063#!/compare/1484611200/1484697600 - sold for Duped Purple Confetti Berliner's Bucket Helm + 4 Keys = 22 keys (outlier)

Credits to Eazy Peazy Squeezy Lemons

http://backpack.tf/profiles/76561198334198375#!/compare/1488585600/1488672000 - sold for 4 keys + sweets = 9 keys (low)

http://backpack.tf/profiles/76561198334198375#!/compare/1488326400/1488585600 - sold for Stormy Storm Airdog = 18 keys (outlier)

Credits to Eazy Peazy Squeezy Lemons

http://backpack.tf/profiles/76561198272871035#!/compare/1484438400/1484611200 - sold with ~2 Keys for a Kill-a-Watt Napper's Respite = 16 keys

Credits to Eazy Peazy Squeezy Lemons

http://backpack.tf/profiles/76561198272871035#!/compare/1484092800/1484438400 - sold Bliz Storm Beanie + ~2 Keys = 17 keys

Credits to Eazy Peazy Squeezy Lemons

http://backpack.tf/profiles/76561198040828537#!/compare/1485561600/1485820800 - sold for 15 keys

http://backpack.tf/profiles/76561198042575758#!/compare/1485734400/1485820800 - sold for 11 keys (low)

http://backpack.tf/profiles/76561198156255538#!/compare/1485043200/1485129600 - sold for Tesla Coil Cranial Carcharodon + sweets = 19 keys (outlier)

http://backpack.tf/profiles/76561197971147670#!/compare/1484611200/1484697600 - sold for 14 keys (quicksold)

http://backpack.tf/profiles/76561198168358562#!/compare/1484092800/1484179200 - sold for Strange Festive Rocket Launcher + sweets = 14 keys (low)

http://backpack.tf/profiles/76561197965442362#!/compare/1484006400/1484092800 - sold for 15 keys

http://backpack.tf/profiles/76561198075970209#!/compare/1486684800/1486771200 - sold for Circling TF Logo Stately Steel Toe = 10 keys (low)

http://backpack.tf/profiles/76561198021642122#!/compare/1483401600/1485907200 - sold with sweets for Neutron Star Wide-Brimmed Bandito = 14 keys (low)

http://backpack.tf/profiles/76561198043334549#!/compare/1488672000/1489017600 - sold for 12 keys (low)

Mini's:

Duped Purple Confetti Berliner's Bucket Helm:

http://backpack.tf/profiles/76561198053252981#!/compare/1488499200/1488585600 - sold for Cloud 9 Larrikin Robin = 18 keys