Squad 1

Sale 1: ~22 Keys. (Bellow Buyers)

https://backpack.tf/profiles/76561198069339256#!/compare/1558224000/1558396800

https://backpack.tf/profiles/76561198252999692#!/compare/1558310400/1558396800

Sale 2: ~26 Keys Pure.

https://backpack.tf/profiles/76561198252999692#!/compare/1558656000/1558742400

https://backpack.tf/profiles/76561198883188648#!/compare/1558656000/1558742400

Sale 3: Untrace.

https://backpack.tf/profiles/76561198883188648#!/compare/1559260800/1559347200

https://backpack.tf/profiles/76561198048851745#!/compare/1559260800/1559347200

Sale 4: ~26 Keys Pure.

https://backpack.tf/profiles/76561198048851745#!/compare/1559779200/1559865600

https://backpack.tf/profiles/76561198069613225#!/compare/1559779200/1559952000

https://bot.tf/stats/listings/4W28925M

https://marketplace.tf/items/tf2/380;5;u7

Sale 5: ~30 Keys.

May 6

$59.00 / $1.8 = 32.78 keys. B/O was 30 keys - https://bot.tf/stats/listings/4O2ZQVQY

Sale 6: ~19 Keys. (low)

Jun 10

$34.15 / $1.81 = 18.87 keys

Sale 7: ~27 Keys.

Jun 15

$49.99 / $1.84 = 27.17 keys

Sale 8: ~27 Keys.

Jun 17

$49.99 / $1.84 = 27.17 keys

Sales: 22/26/26/27/27/30

Going with 26-27 keys.

Thanks to scourge for the premium!