Sale 1:

https://backpack.tf/profiles/76561198091848606#!/compare/1533945600/1534032000

Sold for 13 keys

Sale 2:

https://backpack.tf/profiles/76561198091848606#!/compare/1534032000/1534118400

https://backpack.tf/profiles/76561198049473836#!/compare/1534032000/1534291200

Sold for CPS Merryweather(16)

Sale 3:

https://backpack.tf/profiles/76561198311498888#!/compare/1530403200/1530489600

https://backpack.tf/profiles/76561198070781450#!/compare/1530489600/1531699200

Sold for 13 keys

Sale 4:

https://backpack.tf/profiles/76561198315588518#!/compare/1530748800/1530835200

https://backpack.tf/profiles/76561198112663388#!/compare/1530748800/1530835200

Untrace.

Sale 5:

https://backpack.tf/profiles/76561198315588518#!/compare/1532476800/1532563200

https://backpack.tf/profiles/76561198143610563#!/compare/1513209600/1532563200

Untrace.

Sale 6:

https://backpack.tf/profiles/76561198143610563#!/compare/1532563200/1532649600

https://backpack.tf/profiles/76561198069493147#!/compare/1532563200/1532649600

Sold for C9 Sky High

Use there.

Sale 7:

https://backpack.tf/profiles/76561198069493147#!/compare/1532736000/1532822400

Untrace.

Sale 8:

https://backpack.tf/profiles/76561198047941585#!/compare/1532736000/1532822400

Sold for CPS Translator

Translator Mini:

https://backpack.tf/suggestion/5b7159a7cf6c75451675e537

Suggestion for 15 keys

Sale 9:

https://backpack.tf/profiles/76561198047941585#!/compare/1532822400/1532908800

https://backpack.tf/profiles/76561198177327822#!/compare/1532908800/1533081600

Bulk.

Sale 10:

https://backpack.tf/profiles/76561198177327822#!/compare/1533340800/1533513600

https://backpack.tf/profiles/76561198006544512#!/compare/1533340800/1533427200

Keys?

Sale 11, 12, 13:

https://marketplace.tf/items/99;5;u34

Sold for 28, 25.78, 28.89 USD

Keys at 1.95, 1.96, 1.89 USD

Totals are 14.36, 13.15, 15.29 keys

Total sales @:

13, 13, 13.15, 14.36, 15, 15.29, 16

https://i.imgur.com/KoL3m52.jpg

Buyers up to 12 keys,

Unsold for months at 16 keys,

https://backpack.tf/item/2174680273

https://backpack.tf/item/602117924

Aging seller (month old) at 14 keys

https://backpack.tf/item/1122616223

Play it safe and take 13 - 14 keys.