Sale 1:

https://backpack.tf/profiles/76561198240537922#!/compare/1547337600/1547424000

https://backpack.tf/profiles/76561198052246700#!/compare/1547251200/1547337600

Untrace

Sale 2:

https://backpack.tf/profiles/76561198052246700#!/compare/1547251200/1547337600

https://backpack.tf/profiles/76561198850726828#!/compare/1547251200/1547337600

Untrace

Sale 3:

https://backpack.tf/profiles/76561198850726828#!/compare/1547337600/1547510400

https://backpack.tf/profiles/76561198026129220#!/compare/1547251200/1547337600

Bulk / untrace

Sale 4:

https://backpack.tf/profiles/76561198315588518#!/compare/1549152000/1549238400

https://backpack.tf/profiles/76561198251787492#!/compare/1549152000/1549238400

Sold for ~8.5 keys

Sale 5:

https://backpack.tf/profiles/76561198251787492#!/compare/1549238400/1549324800

https://backpack.tf/profiles/76561198228179196#!/compare/1549152000/1549324800

Low

Sale 6:

https://backpack.tf/profiles/76561198228179196#!/compare/1549324800/1549411200

https://backpack.tf/profiles/76561198343885717#!/compare/1549324800/1549411200

High

Sale 7:

https://backpack.tf/profiles/76561198343885717#!/compare/1549324800/1549411200

https://backpack.tf/profiles/76561198173180554#!/compare/1549411200/1549497600

Untrace

Sale 8:

https://backpack.tf/profiles/76561198173180554#!/compare/1549497600/1549584000

https://backpack.tf/profiles/76561198219185620#!/compare/1546992000/1550102400

Sold for DP Esteem

Use there

Sale 9:

https://backpack.tf/profiles/76561198317606171#!/compare/1547510400/1547596800

https://backpack.tf/profiles/76561198150599141#!/compare/1547510400/1547596800

Sold for ~7.5 keys

Sale 10:

https://backpack.tf/profiles/76561198150599141#!/compare/1547683200/1550275200

https://backpack.tf/profiles/76561198304476963#!/compare/1547596800/1547683200

Keys

Sale 11:

https://backpack.tf/profiles/76561198304476963#!/compare/1547596800/1547683200

https://backpack.tf/profiles/76561198113084770#!/compare/1547596800/1547683200

Bulk

Sale 12:

https://backpack.tf/profiles/76561198113084770#!/compare/1547596800/1547683200

https://backpack.tf/profiles/76561198066707447#!/compare/1547251200/1547683200

Sold for ~7.5 keys

Sale 13:

https://backpack.tf/profiles/76561198066707447#!/compare/1547683200/1547856000

https://backpack.tf/profiles/76561198055969370#!/compare/1547769600/1547856000

Sold for Whirlwind Skating + ~0.5 keys in sweets

Use there

Sale 14:

https://backpack.tf/profiles/76561198055969370#!/compare/1547856000/1548720000

https://backpack.tf/profiles/76561198121386755#!/compare/1548633600/1548806400

Bulk

Sale 15:

https://backpack.tf/profiles/76561198121386755#!/compare/1548892800/1548979200

https://backpack.tf/profiles/76561198337734785#!/compare/1548892800/1548979200

QS

Sale 16:

https://backpack.tf/profiles/76561198337734785#!/compare/1549065600/1549152000

https://backpack.tf/profiles/76561198154395578#!/compare/1549152000/1549238400

Sold for 9 keys

Sale 17:

https://backpack.tf/profiles/76561198154395578#!/compare/1549152000/1549238400

https://backpack.tf/profiles/76561198110823594#!/compare/1548892800/1549238400

Untrace

Sale 18:

https://backpack.tf/profiles/76561198110823594#!/compare/1549584000/1549670400

https://backpack.tf/profiles/76561198368744547#!/compare/1549584000/1549670400

Sold for C9 Mongolian

Use there

Sale 19, 20:

https://marketplace.tf/items/313;5;u11

$14.85 / $1.76 = 8.44 keys

$18.99 / $1.8 = 10.55 keys

Total sales @:

7.5, 7.5, 8.44, 8.5, 9, 10.55 keys

Buyers up to 7.59 keys,

Sellers down to 10 keys (bot.tf listings show he's relisted)

Taking 8 - 9 keys