Sale 1:

https://backpack.tf/profiles/76561198179707937#!/compare/1543708800/1543795200

https://backpack.tf/profiles/76561198403298630#!/compare/1542844800/1544140800

https://backpack.tf/profiles/76561198093337746#!/compare/1543795200/1549411200

Sold for 32 keys

Sale 2:

https://backpack.tf/profiles/76561198258264645#!/compare/1547078400/1547164800

https://backpack.tf/profiles/76561198081545518#!/compare/1546560000/1547251200

Sold with 9 keys for Burning Coupe

Use there

Sale 3:

https://backpack.tf/profiles/76561198081545518#!/compare/1549670400/1549756800

https://backpack.tf/profiles/76561198024925599#!/compare/1549584000/1549670400

Sold for 27 keys

Sale 4:

https://backpack.tf/profiles/76561198024925599#!/compare/1550793600/1550966400

https://backpack.tf/profiles/76561198046658031#!/compare/1550880000/1550966400

Sold for Aussie RL(35) + negligible sweets

Sale 5:

https://backpack.tf/profiles/76561198046658031#!/compare/1550966400/1551052800

https://backpack.tf/profiles/76561198832639251#!/compare/1550966400/1551052800

Untrace

Sale 6:

https://backpack.tf/profiles/76561198164003933#!/compare/1550880000/1551052800

https://backpack.tf/profiles/76561198006544512#!/compare/1550966400/1551052800

Sold for 26 keys

Sale 7:

https://marketplace.tf/items/330;5;u14

https://backpack.tf/item/228053248

$66.60 / $1.65 = 40.36 keys

Total sales @:

26, 27, 32, 35, 40.36 keys

2 sellers, one new one poorly bumped,

Buyers up to ~27 keys,

Gonna take 32 - 35 keys, with 40 being a high outlier.