6 years

https://backpack.tf/item/2031874944

https://backpack.tf/profiles/76561198310972287#!/compare/1714089600/1714176000 ~ sold for a sunbeams pyromancers mask + 200 keys

Mini pyromancers:

https://backpack.tf/profiles/76561198252999692#!/compare/1713916800/1714003200 ~ 568 pure matches

= 768 keys.

https://backpack.tf/profiles/76561199032322140#!/compare/1711065600/1713830400 ~ added 425 keys for a GE Veil

Mini veil:

https://backpack.tf/suggestion/6608f3e202268b05580724de

= 700 keys.

This might not be 100% accurate as the Veil may need a resuggestion from Crimson, and I will try to see if I can properly price the pyromancers but im in the middle of it and it seems a bit difficult.