sale #1 - https://marketplace.tf/items/tf2/30977;5;u9 | https://backpack.tf/item/7154405117 | no clue on b/o

$49.65 / $1.69 = 29.38 keys

sale #2 - bulk

https://backpack.tf/profiles/76561198114402400#!/compare/1586563200/1586649600

https://backpack.tf/profiles/76561197966905013#!/compare/1586649600/1586736000

sale #3 - untrace

https://backpack.tf/profiles/76561198114402400#!/compare/1587686400/1587772800

https://backpack.tf/profiles/76561198171586405#!/compare/1587686400/1587772800

sale #4 - use there

https://backpack.tf/profiles/76561198021055079#!/compare/1587859200/1587945600

https://backpack.tf/profiles/76561198171586405#!/compare/1587859200/1587945600

sale #5 - untrace

https://backpack.tf/profiles/76561198080179568#!/compare/1580860800/1580947200

https://backpack.tf/profiles/76561198084661970#!/compare/1580947200/1581206400

sale #6 - 37 keys (user quicksold the 2 hats to scrap and instantly bought the eyewear)

https://backpack.tf/profiles/76561198080179568#!/compare/1581379200/1581465600

https://backpack.tf/profiles/76561198272089853#!/compare/1581292800/1581465600

sale #7 - untrace

https://backpack.tf/profiles/76561198337734785#!/compare/1584835200/1584921600

https://backpack.tf/profiles/76561198853308799#!/compare/1584489600/1584921600

sale #8 - untrace

https://backpack.tf/profiles/76561198337734785#!/compare/1585267200/1585353600

https://backpack.tf/profiles/76561198346222059#!/compare/1585267200/1585353600

sale #9 - 35 keys

https://backpack.tf/profiles/76561198203288139#!/compare/1581465600/1581552000

https://backpack.tf/profiles/76561198039988842#!/compare/1581552000/1581638400

sale #10 - 37 keys

https://backpack.tf/profiles/76561198083924713#!/compare/1581552000/1582502400

https://backpack.tf/profiles/76561198203288139#!/compare/1581724800/1581811200

sale #11 - untrace (topper does not match)

https://backpack.tf/profiles/76561198244409420#!/compare/1580256000/1580428800

https://backpack.tf/profiles/76561198832697859#!/compare/1580342400/1580428800

sale #12 - untrace

https://backpack.tf/profiles/76561198832697859#!/compare/1581120000/1581206400

https://backpack.tf/profiles/76561198305494036#!/compare/1581120000/1581206400

sale #13 - untrace

https://backpack.tf/profiles/76561198339381843#!/compare/1581379200/1581465600

https://backpack.tf/profiles/76561198269395083#!/compare/1581292800/1581465600

sale #14 - using there / bulk

https://backpack.tf/profiles/76561198157599811#!/compare/1584748800/1584835200

https://backpack.tf/profiles/76561198050745352#!/compare/1584748800/1584835200

sale #15 - https://marketplace.tf/items/tf2/30977;5;u9 | https://backpack.tf/item/6926823773 |

$49.64 / $1.69 = 29.37 keys

sale #16 - untrace

https://backpack.tf/profiles/76561198267189538#!/compare/1581724800/1581811200

https://backpack.tf/profiles/76561198217689404#!/compare/1581724800/1581811200

sale #17 - 34? no clue

https://backpack.tf/profiles/76561198080179568#!/compare/1583539200/1583625600

https://backpack.tf/profiles/76561198267189538#!/compare/1583539200/1583625600

sale #18 - 38 keys

https://backpack.tf/profiles/76561198080179568#!/compare/1585267200/1585353600

https://backpack.tf/profiles/76561198170095653#!/compare/1585267200/1585353600

Rest from https://backpack.tf/item/6743743605 is gambling

sale #19 - https://marketplace.tf/items/tf2/30977;5;u9 | no clue | no clue

$71.99 / $1.71 = 42.10 keys

sale #20 - 21 - https://marketplace.tf/items/tf2/30977;5;u9 | no clue | no clue

$71.99 / $1.79 = 40.22 keys

$71.99 / $1.79 = 40.22 keys

---

Classi - https://gyazo.com/623da224edd271a003189a9739a9739f

excluding the sales below 36 due to buyers

Taking 37 - 42 keys