https://marketplace.tf/items/tf2/1168;5;u3004

$16 / $1.85 = 8.65 keys

$17 / $1.87 = 9.09 keys

$17 / $1.87 = 9.09 keys

$17 / $1.86 = 9.14 keys

$11.99 / $1.83 = 6.55 keys

$13 / $1.77 = 7.34 keys

$7.54 / $1.75 = 4.31 keys

$14.85 / $1.75 = 8.49 keys

$15 / $1.75 = 8.57 keys

$17.81 / $2.00 = 8.90 keys

$15.70 / $2.00 = 7.85 keys

https://backpack.tf/profiles/76561198453530349#!/compare/1606003200/1606089600

https://backpack.tf/profiles/76561198162797626#!/compare/1606003200/1606176000

6 keys

https://backpack.tf/profiles/76561198258728302#!/compare/1600992000/1601078400

https://backpack.tf/profiles/76561198045147799#!/compare/1601078400/1601164800

Use on Top

https://backpack.tf/profiles/76561198120774019#!/compare/1604793600/1604880000

https://backpack.tf/profiles/76561198124633819#!/compare/1604793600/1604880000

5 keys

https://gyazo.com/3c7da73f8e9142f2c4ce40168737e878 - sold for 6 keys

https://marketplace.tf/items/tf2/1168;5;u3004 - new sale at $15.99 (7.5~ keys)

https://backpack.tf/profiles/76561198162797626#!/compare/1610582400/1610668800

https://backpack.tf/profiles/76561198114402400#!/compare/1610496000/1610582400 - bulk

https://backpack.tf/profiles/76561199106217370#!/compare/1609372800/1609459200

https://backpack.tf/profiles/76561198008212178#!/compare/1609113600/1609545600 - sold for 6 keys

https://backpack.tf/profiles/76561198841279602#!/compare/1608422400/1608508800

https://backpack.tf/profiles/76561198860453994#!/compare/1604880000/1608508800 - sold for 6 keys

https://backpack.tf/profiles/76561198124633819#!/compare/1609891200/1609977600 - sold for 6 keys

6 - 7.5