Sellers:

http://www.tf2outpost.com/trade/28730894 - b/o: 100 keys (4 months)

http://www.tf2outpost.com/trade/29208534 - b/o: 20 keys (2 weeks)

http://www.tf2outpost.com/trade/28892478 - b/o: 28 keys (2 months)

Sold:

https://marketplace.tf/items/53;5;u29 - sold for $69.99 = 37 keys (outlier), $35 = 17 keys (low)

http://backpack.tf/profiles/76561198046831877#!/compare/1494115200/1494288000 - ?

http://backpack.tf/profiles/76561198046831877#!/compare/1493164800/1493337600 - ?

http://www.tf2outpost.com/trade/28898993 - ?

http://backpack.tf/profiles/76561198002757046#!/compare/1490832000/1490918400

http://backpack.tf/profiles/76561198095549699#!/compare/1490832000/1490918400 - ?

http://www.tf2outpost.com/trade/29132118

http://backpack.tf/profiles/76561198138611987#!/compare/1494288000/1494374400 - sold for Eerie Orbiting Fire Coupe D'isaster (18) + 3 keys = 21 keys

Mini’s:

Eerie Orbiting Fire Coupe D'isaster:

http://backpack.tf/suggestion/593167f3e338773d4d7058b0 = 18 keys

Conclusion:

sales at 17, 21, 37

seller at 20

taking 20-21 keys

Previous Suggestion: https://backpack.tf/suggestion/59316870c440455078210989