Sale 1:

https://backpack.tf/profiles/76561198298904076

https://backpack.tf/profiles/76561198066835150#!/compare/1546646400/1546992000

Untrace

Sale 2:

https://backpack.tf/profiles/76561198066835150#!/compare/1546992000/1547078400

https://backpack.tf/profiles/76561198056571743#!/compare/1546992000/1547078400

Sold with ~3 keys in sweets for some amount of keys

Sale 3:

https://backpack.tf/profiles/76561198056571743#!/compare/1547078400/1547164800

https://backpack.tf/profiles/76561198159813814#!/compare/1546819200/1547164800

Untrace

Sale 4:

https://backpack.tf/profiles/76561198004952793#!/compare/1545782400/1546300800

https://backpack.tf/profiles/76561197995152235#!/compare/1546128000/1546300800

Sold for ~21 keys in keys / sweets

Sale 5:

https://backpack.tf/profiles/76561197995152235#!/compare/1549238400/1549497600

https://backpack.tf/profiles/76561198043936328#!/compare/1549411200/1549497600

Untrace

Sale 6:

https://backpack.tf/profiles/76561198043936328#!/compare/1549584000/1549670400

https://backpack.tf/profiles/76561198070969384#!/compare/1549238400/1551225600

Untrace

Sale 7:

https://backpack.tf/profiles/76561198225894904#!/compare/1545436800/1545696000

https://backpack.tf/profiles/76561198256438505#!/compare/1545609600/1545696000

Sold for ~18 keys

Sale 8:

https://backpack.tf/profiles/76561198256438505#!/compare/1545955200/1546041600

https://backpack.tf/profiles/76561198113759677#!/compare/1545955200/1546041600

Sold for 22 keys

Sale 9:

https://backpack.tf/profiles/76561198113759677#!/compare/1546300800/1546387200

https://backpack.tf/profiles/76561198160856661#!/compare/1546300800/1546387200

Bulk

Sale 10:

https://backpack.tf/profiles/76561198160856661#!/compare/1546819200/1546905600

https://backpack.tf/profiles/76561198070705963#!/compare/1546819200/1546905600

Bulk QS

Sale 11:

https://backpack.tf/profiles/76561198070705963#!/compare/1547424000/1547510400

https://backpack.tf/profiles/76561198326001685#!/compare/1547424000/1547510400

Sold for 20 keys

Sale 12:

https://backpack.tf/profiles/76561198326001685#!/compare/1548028800/1548201600

https://backpack.tf/profiles/76561198420463886#!/compare/1547942400/1548201600

Sold for 21 keys

Sale 13:

https://backpack.tf/profiles/76561198420463886#!/compare/1548201600/1548288000

https://backpack.tf/profiles/76561198316819529#!/compare/1548288000/1548374400

Untrace

Sale 14:

https://backpack.tf/profiles/76561198316819529#!/compare/1548288000/1548374400

https://backpack.tf/profiles/76561198833634376#!/compare/1548288000/1548374400

Sold for EOF YWN

YWN Mini:

https://backpack.tf/suggestion/5c80b56ad38172651126d4c3

Suggestion for 22 keys

Sale 15:

https://backpack.tf/profiles/76561198833634376#!/compare/1548460800/1548547200

https://backpack.tf/profiles/76561198120768380#!/compare/1546819200/1548547200

Untrace

Sale 16:

https://backpack.tf/profiles/76561198120768380#!/compare/1546819200/1548547200

https://backpack.tf/profiles/76561198076099046#!/compare/1548460800/1548547200

Sold for Strange Steaming Pomp + negligible sweets

Pomp Mini:

https://backpack.tf/suggestion/5c80b95b67807228e9732ae1

Suggestion for 24.5 keys

Sale 17:

https://backpack.tf/profiles/76561198076099046#!/compare/1548633600/1549152000

https://backpack.tf/profiles/76561198165055074#!/compare/1548633600/1549152000

Bulk for Scatter

Sale 18:

https://backpack.tf/profiles/76561198066813088#!/compare/1547337600/1547596800

https://backpack.tf/profiles/76561198337734785#!/compare/1547510400/1547596800

QS

Sale 19:

https://backpack.tf/profiles/76561198337734785#!/compare/1548288000/1548374400

https://backpack.tf/profiles/76561198285371555#!/compare/1548288000/1548374400

Can trace 15 keys

Sale 20:

https://backpack.tf/profiles/76561198285371555#!/compare/1548460800/1548547200

https://backpack.tf/profiles/76561198031544472#!/compare/1548460800/1548547200

Sold with ~5 keys in sweets for Puzzle Bicorne

Bicorne Mini:

https://backpack.tf/suggestion/5c80a0aad381724d9224b65d

Suggestion for 23.5 keys

Total is 18.5 keys

Sale 21:

https://backpack.tf/profiles/76561198031544472#!/compare/1548633600/1548720000

https://backpack.tf/profiles/76561198372525896#!/compare/1548633600/1548720000

Use there.

Sale 22:

https://backpack.tf/profiles/76561198372525896#!/compare/1549497600/1549584000

https://backpack.tf/profiles/76561198348057478#!/compare/1549411200/1549497600

Bulk

Sale 23:

https://backpack.tf/profiles/76561198348057478#!/compare/1549411200/1549497600

https://backpack.tf/profiles/76561198119161228#!/compare/1549411200/1549497600

Sold for DP Yellow Belt(17.5) + ~6 keys in sweets

Total is 23.5 keys

Sale 24:

https://marketplace.tf/items/631;5;u35

$53.99 / $1.8 = 29.99 keys

Total sales @:

15, 18, 18.5, 20, 21, 21, 22, 22, 23.5, 24.5, 29.99 keys

Buyers up to 19 keys

Sellers down to 30, poorly bumped seller for 28.

Excluding 29.99 due to distance,

20 due to flip for 21,

taking 21 - 25 keys