Selling:

http://www.tf2outpost.com/trade/28664447 - b/o: 60 keys (young)

http://www.tf2outpost.com/trade/28607228 - b/o: 70 keys (1 month)

http://www.tf2outpost.com/trade/28639335 - b/o: 70 keys (2 weeks)

Sold:

http://www.tf2outpost.com/trade/28609265

http://backpack.tf/profiles/76561198053747026#!/compare/1479168000/1479254400 - sold for Burning Flames Big Country = 75 keys b/o

http://www.tf2outpost.com/trade/28562326

http://backpack.tf/profiles/76561198054865264#!/compare/1478044800/1478217600 - sold for 56 keys (outlier)

http://backpack.tf/profiles/76561198074924331#!/compare/1478908800/1479081600

http://backpack.tf/profiles/76561198067575136#!/compare/1478995200/1479081600 - sold for Vivid Plasma Head Warmer + 20 keys = 73 keys

http://www.tf2outpost.com/trade/28488746

http://backpack.tf/profiles/76561198044350516#!/compare/1475884800/1475971200

http://backpack.tf/profiles/76561198125791160#!/compare/1475884800/1475971200 - sold for Hellfire Armored Authority + Orbiting Planets Janissary Ketche = 70 keys

Mini's:

Vivid Plasma Head Warmer:

no recent valid sales, taking current price

Hellfire Armored Authority:

http://backpack.tf/profiles/76561198163494756#!/compare/1478908800/1478995200 - sold with 1 key for Frostbite Sergeant's Drill Hat = 59 keys

Orbiting Planets Janissary Ketche:

http://www.tf2outpost.com/trade/28614082

http://backpack.tf/profiles/76561198000247762#!/compare/1474243200/1479427200 - sold with sweets for Circling TF Logo Cyborg Stunt Helmet = 11 keys