Sale 1: 40 USD on mp.tf. 1 key =1.95 USD --> 20.5 keys; rounding to 21

https://marketplace.tf/items/30616;5;u3016

Sale 2: 64.99 USD on mp.tf . 1 key = 1.96 USD --> 33 keys

https://marketplace.tf/items/30616;5;u3016

Sale 3: Untraceable

https://backpack.tf/profiles/76561198195734346#!/compare/1512691200/1512777600

Sale 4: Untraceable

https://backpack.tf/profiles/76561198094411310#!/compare/1512000000/1512086400

Sale 5: Untraceable

https://backpack.tf/profiles/76561198003823644#!/compare/1509926400/1510012800

Sale 5: Bulk for Sunbeams Belgian

https://backpack.tf/profiles/76561198138392299#!/compare/1512518400/1512604800

Sale 6: Sold for 30 USD on mp.tf. 1 key = 2.02 USD --> 14.85 keys; rounding to 15

https://marketplace.tf/items/30616;5;u3016

Sale 7: Gambling

https://backpack.tf/profiles/76561198004581124#!/compare/1514419200/1514764800

https://backpack.tf/profiles/76561198075024818#!/compare/1514592000/1514678400

Seller at 50 USD on mp.tf. 1 key atm is 1.97 USD --> 25.3 keys

https://marketplace.tf/items/30616;5;u3016

Mindacos advised to resuggest this at 21 flat due to 15 maybe being a QS.