https://marketplace.tf/items/tf2/30422;5;u18

$69.99 / $2.19 = 31.96 keys

$62.99 / $2.14 = 29.43 keys

https://backpack.tf/item/5645371546 looks like it took 3 months

https://backpack.tf/profiles/76561198135951468#!/compare/1612483200/1612656000

https://backpack.tf/profiles/76561198234979956#!/compare/1612569600/1612656000

24 keys

https://backpack.tf/profiles/76561198234979956#!/compare/1613779200/1613952000

https://backpack.tf/profiles/76561198377165880#!/compare/1613865600/1613952000

Bulk

https://backpack.tf/profiles/76561198211967715#!/compare/1617062400/1617235200

https://backpack.tf/profiles/76561198841279602#!/compare/1616976000/1617062400

21 keys and ref

https://backpack.tf/profiles/76561199088995056#!/compare/1613088000/1613174400

https://backpack.tf/profiles/76561198115509750#!/compare/1612828800/1613088000

Untraceable

https://backpack.tf/profiles/76561198115509750#!/compare/1613088000/1613174400

https://backpack.tf/profiles/76561199102407070#!/compare/1613088000/1613174400

Untraceable, went to buy order

https://backpack.tf/item/9273277459

spent 2 months unsold until it sold for 25 keys 28.66 refined according to gladiator stats, but sale is untraceable and unknown buyer

https://backpack.tf/profiles/76561199102407070#!/compare/1619308800/1619395200

https://gladiator.tf/sales?item=Circling%20Peace%20Sign%20Vive%20La%20France&at=2021-05-07T22:09:10.642Z

sales

21 to buy order

24

25.8 somewhere

29

32

https://gyazo.com/03bc93520c0c12762891dd4d22e32d2e

2 months at 26

buyers to 22

let's go with 24-26