Sale 1:

https://backpack.tf/profiles/76561198053747026#!/compare/1532304000/1532390400

https://backpack.tf/profiles/76561198082070035#!/compare/1532304000/1532390400

Sold for 17 keys

Sale 2:

https://backpack.tf/profiles/76561198082070035#!/compare/1532390400/1532476800

https://backpack.tf/profiles/76561198079869886#!/compare/1532390400/1532476800

Sold for 16 keys + negligible ref (doesn't make sense based on previous sale)

Sale 3:

https://backpack.tf/profiles/76561198079869886#!/compare/1532476800/1532649600

https://backpack.tf/profiles/76561198424596993#!/compare/1532563200/1532649600

Untrace.

Sale 4:

https://backpack.tf/profiles/76561198424596993#!/compare/1532736000/1532822400

Untrace.

Sale 5:

https://backpack.tf/profiles/76561198159317851#!/compare/1532908800/1533081600

https://backpack.tf/profiles/76561198187962094#!/compare/1533081600/1533254400

Sold for Strange DBD Sammy Cap

Use there.

Sale 6:

https://backpack.tf/profiles/76561198187962094#!/compare/1533081600/1533254400

https://backpack.tf/profiles/76561198049901581#!/compare/1533168000/1533254400

Sold for Grail Kick(23.5)

Sale 7:

https://backpack.tf/profiles/76561198049901581#!/compare/1533168000/1533254400

https://backpack.tf/profiles/76561198042132655#!/compare/1533168000/1533254400

Looks like Showstopper Party Trick + sweets, how ever keys on Buyer side and Results on both have somewhat matching histories, calling unusable because I can't decipher.

Sale 8:

https://backpack.tf/profiles/76561198042132655#!/compare/1533254400/1533340800

https://backpack.tf/profiles/76561198804960009#!/compare/1533254400/1533340800

Sold for 16 keys

Sale 9:

https://backpack.tf/profiles/76561198804960009#!/compare/1533340800/1533427200

https://backpack.tf/profiles/76561198085323548#!/compare/1533254400/1533427200

Sold for Smoking Impaler + 5 keys

Use there, because Impaler needs the sales.

Sale 10:

https://marketplace.tf/items/628;5;u61

Sold for 37.8 USD

Keys at 1.93 USD

Total is 19.59 keys

Total sales @:

16, 16, 17, 19.58, 23.5

https://i.imgur.com/eZqE5aJ.png

Buyers up to ~14 keys

Unsold for 3 months at 20 keys.

https://backpack.tf/item/2007247019

Taking 16 - 20 keys.