https://marketplace.tf/items/tf2/1118;5;u3051

$99.99 / $2.10 = 47.61 keys https://backpack.tf/item/4768570535

$119.99 / $2.19 = 54.79 keys https://backpack.tf/item/6310076766

https://backpack.tf/profiles/76561198212497608#!/compare/1609718400/1609804800

https://backpack.tf/profiles/76561198095022965#!/compare/1609718400/1609804800

bulk

https://backpack.tf/profiles/76561198095022965#!/compare/1614556800/1614643200

https://backpack.tf/profiles/76561198088665810#!/compare/1614556800/1614643200

40 keys

https://backpack.tf/profiles/76561198076181564#!/compare/1610496000/1610582400

https://backpack.tf/profiles/76561198087558444#!/compare/1610496000/1610582400

untraceable, doesn't seem to be the 31 keys

https://backpack.tf/profiles/76561198087558444#!/compare/1613174400/1613347200

https://backpack.tf/profiles/76561198302382325#!/compare/1613347200/1613520000

29 keys

https://backpack.tf/profiles/76561197963500354#!/compare/1610323200/1610409600

https://backpack.tf/profiles/76561198065935641#!/compare/1609977600/1611273600

Untraceable SCM

https://backpack.tf/profiles/76561198333745219#!/compare/1609200000/1609286400

https://backpack.tf/profiles/76561199006971039#!/compare/1609200000/1609286400

Burning Flames Murderer's Motif, better used there

https://backpack.tf/profiles/76561199006971039#!/compare/1609200000/1609286400

https://backpack.tf/profiles/76561198091502579#!/compare/1609200000/1609286400

23 keys and 7 refined, sold same day

https://backpack.tf/profiles/76561198041144544#!/compare/1609804800/1610150400

https://backpack.tf/profiles/76561199099101053#!/compare/1609977600/1610064000

Untraceable

https://backpack.tf/profiles/76561199099101053#!/compare/1610064000/1610150400

https://backpack.tf/profiles/76561198087558444#!/compare/1610064000/1610150400

25 keys

https://backpack.tf/profiles/76561198087558444#!/compare/1612396800/1612483200

https://backpack.tf/profiles/76561198091502579#!/compare/1612396800/1612483200

30 keys

Sales

23 sold in a day

25 also sold in a day

29

30

40

48 marketplace

55 marketplace

48 and 55 are way too high

2 buyers to 25 https://gyazo.com/c22bfcf8385bd25a4fb8fe223f38bf74

going with 29-40