Only recent sale

https://backpack.tf/item/389112107

https://backpack.tf/profiles/76561198177872379#!/compare/1774656000/1774742400

https://backpack.tf/profiles/76561198084367252#!/compare/1774483200/1774828800

https://files.catbox.moe/b87uo8.jpg

https://files.catbox.moe/vr6mfb.jpg

As per Shuffle Spy the key price used in this suggestion from 4/2 is useable here:

https://backpack.tf/suggestion/69f04c04ee79e6d4ea029131

https://files.catbox.moe/wfpstt.PNG

$553.80 / $1.735 =

319.19 keys

Rounding to 320 as per price suggestion guidelines.