Sale 1:

https://backpack.tf/profiles/76561198135388328#!/compare/1538006400/1538092800

https://backpack.tf/profiles/76561198094730000#!/compare/1538006400/1538092800

Untrace.

Sale 2:

https://backpack.tf/profiles/76561198094730000#!/compare/1538006400/1538092800

https://backpack.tf/profiles/76561198018719204#!/compare/1536364800/1538092800

Bulky

Sale 3:

https://backpack.tf/profiles/76561198018719204#!/compare/1538092800/1538179200

https://backpack.tf/profiles/76561198133295803#!/compare/1538092800/1538179200

Untrace / bulk.

Sale 4:

https://backpack.tf/profiles/76561198133295803#!/compare/1538092800/1538179200

https://backpack.tf/profiles/76561198197841087#!/compare/1538092800/1538179200

Untrace.

Sale 5:

https://backpack.tf/profiles/76561198197841087#!/compare/1538092800/1538179200

https://backpack.tf/profiles/76561198080669489#!/compare/1538092800/1538179200

Bulk.

Sale 6:

https://backpack.tf/profiles/76561198053418437#!/compare/1533513600/1533600000

https://backpack.tf/profiles/76561198000091310#!/compare/1533513600/1533600000

Sold with ~3.83 keys in sweets for Blizzardy Toque

Toque Mini:

https://backpack.tf/suggestion/5bb029d744325a049856330c

Suggestion for 17 keys

Total is ~13 keys

Sale 7:

https://backpack.tf/profiles/76561198000091310#!/compare/1533600000/1533686400

https://backpack.tf/profiles/76561198109452231#!/compare/1533600000/1533686400

Sold with negligible sweets for Smoking Tree

Tree Mini:

https://backpack.tf/suggestion/5baf2a8dcf6c7541fb19775b

Suggestion for 15 keys

Sale 8:

https://backpack.tf/profiles/76561198385681762#!/compare/1535328000/1535414400

https://backpack.tf/profiles/76561198133868529#!/compare/1535328000/1535414400

Sold for ST BAL(6.5) + 4 keys

Total is 10.5 keys

Sale 9:

https://backpack.tf/profiles/76561198133868529#!/compare/1535414400/1535500800

https://backpack.tf/profiles/76561198412941346#!/compare/1535414400/1535500800

Gamble?

Sale 10:

https://backpack.tf/profiles/76561198111322090#!/compare/1536192000/1536278400

https://backpack.tf/profiles/76561198410429966#!/compare/1536192000/1536278400

QS?

Sale 11:

https://backpack.tf/profiles/76561198410429966#!/compare/1536278400/1536364800

https://backpack.tf/profiles/76561198407006659#!/compare/1536278400/1536364800

Untrace.

Total sales @:

10.5, 13, 15 keys

Buyers up to 10 keys

Calling 10.5 low,

Taking 13 - 15 keys.