Sale 1:

https://backpack.tf/profiles/76561198198079765#!/compare/1524182400/1524268800

https://backpack.tf/profiles/76561198292242424#!/compare/1524182400/1524268800

Sold for 20 keys

http://www.tf2outpost.com/trade/29626179

B/O of 30 keys.

Sale 2:

https://backpack.tf/profiles/76561198118114865#!/compare/1522713600/1522800000

https://backpack.tf/profiles/76561198396499936#!/compare/1522713600/1522800000

Sold for DP Buckaroo + OF Esteem

Esteem Mini:

https://backpack.tf/profiles/76561198376244015#!/compare/1523491200/1523577600

https://backpack.tf/profiles/76561198099736383#!/compare/1523145600/1523577600

Sold for KS Aussie Frontier(10.25)

Buckaroo Mini:

https://marketplace.tf/items/322;5;u60

Sold for 31.03 USD, keys at 1.97.

Total is 31.03 / 1.97 = 15.75 keys

Seems high, seller at roughly 11 keys. taking average of 13 keys.

Total is 23.25 keys.

Sale 3:

https://backpack.tf/profiles/76561198000693929#!/compare/1522540800/1522713600

https://backpack.tf/profiles/76561198136660423#!/compare/1522368000/1522713600

Sold with 3 keys for Strange TW Pillar

Pillar Mini:

https://backpack.tf/suggestion/5af0b90c44325a517b455716

Suggestion for 23 keys.

Total is 20 keys.

Sale 4:

https://backpack.tf/profiles/76561198204215085#!/compare/1520553600/1520726400

https://backpack.tf/profiles/76561198000693929#!/compare/1520640000/1520726400

Bulk.

Sale 5:

https://backpack.tf/profiles/76561198332453694#!/compare/1520380800/1520467200

https://backpack.tf/profiles/76561198204215085#!/compare/1520380800/1520467200

Sold for TW Counter

Obviously low, not using.

Sale 6:

https://backpack.tf/profiles/76561198292242424#!/compare/1520294400/1520380800

https://backpack.tf/profiles/76561198332453694#!/compare/1520294400/1520380800

Sold with 2.32 keys in sweets for Frostbite Outdoorsman.

Outdoorsman Mini:

https://backpack.tf/profiles/76561198162468891#!/compare/1522713600/1522886400

https://backpack.tf/profiles/76561198101719667#!/compare/1522713600/1522886400

Sold with ~0.6 keys in sweets for Neutron Spartan(35)

Taking 34.4 keys.

Total sales @:

20, 20, 23.25, 34.4

Calling 34.4 an outlier.

Taking 20 to 23 keys.