Sale #1:

Sold with sweets for a Bubbling Western Wear (11 keys)-

Seller: https://backpack.tf/profiles/76561198260351341#!/compare/1523577600/1523836800

Buyer: https://backpack.tf/profiles/76561198091502579#!/compare/1523491200/1523577600

Sale #2:

Sold for a '72 Taunt: The Skating Scorcher (11.5 keys) + 14 refined + Sweets = 12ish keys-

Seller: https://backpack.tf/profiles/76561198032016356#!/compare/1531008000/1531094400

Buyer: https://backpack.tf/profiles/76561198131002920#!/compare/1531094400/1531180800

Sale #3:

Sold for 10 keys pure-

Seller: https://backpack.tf/profiles/76561198064804350#!/compare/1527811200/1527984000

Buyer: https://backpack.tf/profiles/76561198061108999#!/compare/1527897600/1527984000

The seller got the keys in different moments for some reason but here's the history of the keys to show that they were traded by the same trader:

Key's History in trade with 4 keys:

#1: https://backpack.tf/item/6033533506

#2: https://backpack.tf/item/6018982560

#3: https://backpack.tf/item/4829113570

#4: https://backpack.tf/item/6695113674

Key's History in trade with 6 keys:

#1: https://backpack.tf/item/4632513612

#2: https://backpack.tf/item/6073392168

#3: https://backpack.tf/item/6205811205

#4: https://backpack.tf/item/5618951006

#5: https://backpack.tf/item/6494861825

#6: https://backpack.tf/item/6699088573