Sale 1:

https://backpack.tf/profiles/76561198882367145#!/compare/1552867200/1553040000

https://backpack.tf/profiles/76561198119149660#!/compare/1552953600/1553040000

Untrace

Sale 2:

https://backpack.tf/profiles/76561198073307808#!/compare/1554076800/1555200000

https://backpack.tf/profiles/76561197997268820#!/compare/1555027200/1555113600

Untrace

Sale 3:

https://backpack.tf/profiles/76561198394457682#!/compare/1549324800/1549411200

https://backpack.tf/profiles/76561198099982911#!/compare/1549324800/1549411200

Sold for ~14 keys in items

Sale 4:

https://backpack.tf/profiles/76561198099982911#!/compare/1549324800/1549411200

https://backpack.tf/profiles/76561198002757046#!/compare/1549324800/1549411200

Sold for Searing Tippler(14)

Sale 5:

https://backpack.tf/profiles/76561198002757046#!/compare/1549756800/1549843200

https://backpack.tf/profiles/76561198163470512#!/compare/1549756800/1549929600

Sold for ~11 keys

sale 6:

https://backpack.tf/profiles/76561198163470512#!/compare/1550016000/1550102400

https://backpack.tf/profiles/76561198170045102#!/compare/1550016000/1550102400

Sold for 11 keys

Sale 7:

https://backpack.tf/profiles/76561198170045102#!/compare/1550016000/1550102400

https://backpack.tf/profiles/76561198345788867#!/compare/1549929600/1550102400

Sold for Smoking Big Chief(10.5) + ~3 keys in sweets

Total is 13.5 keys

sale 8:

https://backpack.tf/profiles/76561198345788867#!/compare/1550188800/1550275200

https://backpack.tf/profiles/76561198369185032#!/compare/1550188800/1550275200

Sold with 5 keys for CTFL Noble(19.5)

Total is 14.5 keys

https://bot.tf/stats/listings/4K1188XY

B/O of 15 keys

Sale 9:

https://backpack.tf/profiles/76561198369185032#!/compare/1550188800/1550275200

https://backpack.tf/profiles/76561198142307778#!/compare/1550188800/1550275200

Untrace

Sale 10:

https://backpack.tf/profiles/76561198142307778#!/compare/1550188800/1550275200

https://backpack.tf/profiles/76561198094559788#!/compare/1550102400/1550275200

Sold for 11 keys

Sale 11:

https://backpack.tf/profiles/76561198094559788#!/compare/1550361600/1550448000

https://backpack.tf/profiles/76561198282858365#!/compare/1550361600/1550448000

Sold for 11 keys

Sale 12:

https://backpack.tf/profiles/76561198282858365#!/compare/1550448000/1550534400

https://backpack.tf/profiles/76561198003698220#!/compare/1550448000/1550534400

Sold for ~11 keys

Sale 13:

https://backpack.tf/profiles/76561198003698220#!/compare/1550707200/1550793600

https://backpack.tf/profiles/76561198197105903#!/compare/1550534400/1550793600

Sold for 11 keys

Sale 14:

https://backpack.tf/profiles/76561198197105903#!/compare/1550534400/1550793600

https://backpack.tf/profiles/76561198046569797#!/compare/1550534400/1550793600

Sold for Showstopper Banjo

https://bot.tf/stats/listings/MQD9N32Y

B/O of 14 keys

Use there

Sale 15:

https://backpack.tf/profiles/76561198046569797#!/compare/1551052800/1551139200

https://backpack.tf/profiles/76561198006544512#!/compare/1551052800/1551139200

QS

Sale 16:

https://backpack.tf/profiles/76561198006544512#!/compare/1554854400/1554940800

https://backpack.tf/profiles/76561198153226176#!/compare/1554854400/1555200000

SCM

Sale 17:

https://backpack.tf/profiles/76561198168425477#!/compare/1556236800/1556323200

https://backpack.tf/profiles/76561198081042493#!/compare/1556150400/1556236800

Sold for CPS Sterling

https://bot.tf/stats/listings/Y7K3V5L4

B/O of 14 keys

Use there

Sale 18 - 20:

https://marketplace.tf/items/259;5;u61

$17.50 / $1.79 = 9.78 keys

$25.00 / $1.79 = 13.97 keys

$16.09 / $1.78 = 9.04 keys

Total sales @:

9.04, 9.78, 11, 11, 11, 11, 11, 11, 13.5, 13.97, 14, 14, 14.5 keys

Buyers up to 10 keys,

Seller for 14 listed for a bit: https://bot.tf/stats/listings/Y7XQN7KY

dropped from 15.

Gonna take 11 - 14 keys.