Sellers:

https://marketplace.tf/items/30362;5;u58

https://backpack.tf/item/3049714360 - b/o: $199 = 94 keys (3 months)

http://www.tf2outpost.com/trade/28895424 - b/o: 115 keys (3 weeks)

http://www.tf2outpost.com/trade/29179707 - b/o: 85 keys (3 days)

http://www.tf2outpost.com/trade/28699730 - b/o: 110 keys (4 months)

http://www.tf2outpost.com/trade/28689913 - b/o: 100 keys (4 months)

http://www.tf2outpost.com/trade/29183559 - b/o: 110 keys (22 hours)

Sold:

http://backpack.tf/profiles/76561198139276623#!/compare/1494460800/1494547200

http://backpack.tf/profiles/76561198112709115#!/compare/1494374400/1494460800 - sold for 70 keys (quicksold)

http://www.tf2outpost.com/trade/29085709

http://backpack.tf/profiles/76561198059824403#!/compare/1494460800/1494720000 - sold for Starstorm Insomnia Well-Rounded Rifleman = 63 keys (low)

http://backpack.tf/profiles/76561197960489773#!/compare/1491264000/1491350400 - backpack purchase

http://backpack.tf/profiles/76561198117979249#!/compare/1491782400/1491868800

http://backpack.tf/profiles/76561198021228339#!/compare/1491696000/1491868800 - sold for 65 keys (quicksold)

http://www.tf2outpost.com/trade/28893299

http://backpack.tf/profiles/76561198043936328#!/compare/1493078400/1493164800 - sold for Strange Starstorm Slumber Salty Dog + 50 keys = 115 keys b/o (outlier)

http://www.tf2outpost.com/trade/29179707

http://backpack.tf/profiles/76561198287103299#!/compare/1495670400/1495756800 - sold for O. Fire Gibus (62), Blizzy Hotrod (19), KS Aussie Tomislav (12) = 85 keys b/o

Credits to Marty Birdman

Mini's:

O. Fire Gibus:

http://backpack.tf/profiles/76561198175249965#!/compare/1493510400/1493596800 - sold for Starstorm Robo Pillar (26) + Blizzy Hotdog (29) + ~7 = 62 keys

Credits to Marty Birdman

Conclusion:

sales at 63, 65, 70, 85, 115

taking 85 keys