Sale 1:

https://backpack.tf/profiles/76561198060731432#!/compare/1602892800/1602979200

https://backpack.tf/profiles/76561198850003649#!/compare/1602806400/1602979200

Untrace.

Sale 2:

https://backpack.tf/profiles/76561198850003649#!/compare/1602979200/1603065600

https://backpack.tf/profiles/76561199084784906#!/compare/1602979200/1603065600

Untrace.

Sale 3:

https://backpack.tf/profiles/76561199084784906#!/compare/1603152000/1603238400

https://backpack.tf/profiles/76561198091502579#!/compare/1603065600/1603152000

Untrace.

Sale 4:

https://backpack.tf/profiles/76561198091502579#!/compare/1603065600/1603152000

https://backpack.tf/profiles/76561198377796587#!/compare/1603152000/1603756800

Untrace.

Marketplace.tf: https://marketplace.tf/items/tf2/30959;5;u10

Sale 5:

Sep 19 - $59.99 / $1.87 = 32.08 keys, No B/O

= 32 Keys.

Sale 6:

Oct 19 - $59.99 / $1.87 = 32.08 keys, No B/O

= 32 Keys.

Sale 7:

Oct 20 - $59.99 / $1.85 = 32.43 keys, No B/O

= 32 Keys.

Sale 8:

Nov 29 - $34.30 / $1.76 = 19.49 keys, No B/O

= 19 Keys. (Low)

Sale 9:

Nov 29 - $59.99 / $1.76 = 34.09 keys, No B/O

= 34 Keys.

Umm, 59.99 is the magic number i guess? :confusedAF:

Sales: 19, 32, 32, 32, 34

Going with 32-34 keys.