Classifieds: http://backpack.tf/classifieds?item=Airdog&quality=5&tradable=1&craftable=1&australium=-1&particle=7&killstreak_tier=0

Screenshot(s) of Classifieds:

http://imgur.com/HKN0pMP

<Sellers>

17 keys | http://backpack.tf/item/5616535983 | http://backpack.tf/u/76561197981524888 | http://www.tf2outpost.com/trade/28874320 | Listed 6 days ago [Bumped]

19 keys | http://backpack.tf/item/5149376034 | http://backpack.tf/u/76561197963500354 | Listed 15 days ago [Bumped]

22 keys | http://backpack.tf/item/4837544418 | http://backpack.tf/u/76561198086948995 | Listed 4 months ago [Bumped]

22 keys | http://backpack.tf/item/4813457126 | http://backpack.tf/u/76561198043992035 | http://www.tf2outpost.com/trade/28731937 | Listed 16 days ago [Bumped]

http://www.tf2outpost.com/trade/28740619 - b/o: 22 keys (2 months)

Sales:

http://www.tf2outpost.com/trade/28839283

http://backpack.tf/profiles/76561198301015840#!/compare/1489881600/1489968000 - sold with 1 key for Green Black Hole Copper's Hard Top = 19 keys b/o

http://www.tf2outpost.com/trade/28817327

http://backpack.tf/profiles/76561197972215762#!/compare/1489536000/1489622400 - sold for Kill-a-Watt Lord Cockswain's Pith Helmet = 16 keys

http://backpack.tf/profiles/76561197972215762#!/compare/1488672000/1488758400 - sold for Strange Specialized Killstreak Australium Flame Thrower = 16 keys

http://www.tf2outpost.com/trade/28815092

http://backpack.tf/profiles/76561198084153073#!/compare/1488672000/1488758400 - sold for Circling TF Logo Old Guadalajara = 18 keys

http://www.tf2outpost.com/trade/28812418

http://backpack.tf/profiles/76561198084153073#!/compare/1488585600/1488672000 - sold for 16 keys

http://backpack.tf/profiles/76561198079578383#!/compare/1488067200/1488153600 - sold for Circling Heart Sober Stuntman = 20 keys

http://www.tf2outpost.com/trade/28802363

http://backpack.tf/profiles/76561198079578383#!/compare/1487980800/1488067200 - sold for Bubbling Troublemaker's Tossle Cap = 20 keys

http://backpack.tf/profiles/76561198237438384#!/compare/1487894400/1487980800 - sold for Max's Severed Head = 18 keys

http://www.tf2outpost.com/trade/28792211

http://backpack.tf/profiles/76561198056144015#!/compare/1487635200/1487721600 - sold for 15 keys (quicksold)

http://backpack.tf/profiles/76561198082642255#!/compare/1487462400/1487548800 - sold for 16 keys

http://www.tf2outpost.com/trade/28869387

http://backpack.tf/profiles/76561197981524888#!/compare/1491868800/1492041600 - sold for 16 keys

Mini's:

Green Black Hole Copper's Hard Top:

http://backpack.tf/profiles/76561198174392686#!/compare/1489881600/1490054400 - sold for 21 keys

Kill-a-Watt Lord Cockswain's Pith Helmet:

http://backpack.tf/profiles/76561198173027559#!/compare/1490313600/1490400000 - sold for 16 keys

Circling Heart Sober Stuntman:

http://backpack.tf/profiles/76561198301049636#!/compare/1488240000/1488326400 - sold for Steaming Napoleon Complex = 25 keys (outlier)

http://www.tf2outpost.com/trade/28532265 - b/o: 20 keys (6 months)

taking 20 keys