Sellers:

http://www.tf2outpost.com/trade/28831016 - b/o: 23 keys (2 months)

Sold:

https://marketplace.tf/items/30767;5;u29 - sold for $26.50 = 13 keys

http://www.tf2outpost.com/trade/29195324

http://backpack.tf/profiles/76561198143516878#!/compare/1495497600/1495584000

http://backpack.tf/profiles/76561198093253104#!/compare/1495324800/1495497600 - sold for Strange Australium Grenade Launcher (14) = 14 keys

http://backpack.tf/profiles/76561198161013916#!/compare/1494201600/1494547200

http://backpack.tf/profiles/76561198143516878#!/compare/1494806400/1494892800 - scm

http://backpack.tf/profiles/76561198185198978#!/compare/1493769600/1494892800

http://backpack.tf/profiles/76561198161013916#!/compare/1493769600/1494028800 - bulk

http://backpack.tf/profiles/76561198185198978#!/compare/1493164800/1493769600 - bulk

http://backpack.tf/profiles/76561198077345957#!/compare/1493510400/1493683200 - bulk

http://www.tf2outpost.com/trade/28902315

http://backpack.tf/profiles/76561198104618116#!/compare/1493424000/1493510400

http://backpack.tf/profiles/76561198111473589#!/compare/1492819200/1493510400 - sold with 3 keys + sweets (4) for Strange Vivid Plasma Airdog (22) = 15 keys

http://backpack.tf/profiles/76561198104618116#!/compare/1492819200/1492905600 - sold for Blizzardy Storm Hermes (15) + sweets (2) = 17 keys

http://backpack.tf/profiles/76561198054954092#!/compare/1491523200/1491696000

http://backpack.tf/profiles/76561198153043737#!/compare/1491609600/1491696000 - ?

http://www.tf2outpost.com/trade/28842276

http://backpack.tf/profiles/76561198021055079#!/compare/1490486400/1490572800 - sold for Orbiting Planets Airdog (17) + sweets (4) = 17 keys b/o

http://backpack.tf/profiles/76561198219980724#!/compare/1495843200/1495929600 - sold for 12 keys (quicksold)

http://backpack.tf/profiles/76561198219980724#!/compare/1495756800/1495843200 - sold with sweets (3) for Disco Beat Down Voodoo JuJu (Slight Return) (17) = 14 keys

http://www.tf2outpost.com/trade/29182738

http://backpack.tf/profiles/76561197997339757#!/compare/1495238400/1495324800 - sold for Disco Beat Down Helmet Without a Home (19) = 15 keys b/o

http://www.tf2outpost.com/trade/29182226

http://backpack.tf/profiles/76561198155320889#!/compare/1494720000/1494892800 - sold with 2 keys for Kill-a-Watt Grenadier's Softcap (19) = 15 keys b/o

http://backpack.tf/profiles/76561198048008254#!/compare/1494633600/1494720000 - sold for 13 keys (quicksold)

http://backpack.tf/profiles/76561198048008254#!/compare/1494547200/1494633600 - ?

http://www.tf2outpost.com/trade/28905682

http://backpack.tf/profiles/76561198203441399#!/compare/1493683200/1493856000 - sold for Blizzardy Storm Prince Tavish's Crown = 15 keys

http://backpack.tf/profiles/76561198118924350#!/compare/1493510400/1493683200 - bulk

Mini’s:

Strange Vivid Plasma Airdog:

http://backpack.tf/suggestion/59300b13e338776661662fdf = 22 keys

Blizzardy Storm Prince Tavish's Crown:

http://backpack.tf/suggestion/593019eae338773613726ffe = 15 keys

Conclusion:

sales at 12, 13, 13, 14, 14, 15, 15, 15, 15, 17, 17

taking 14-17 keys