Item: https://backpack.tf/item/17087915836

Sale 1:

Seller: https://backpack.tf/profiles/76561198252999692#!/compare/1780012800/1780099200

Buyer: https://backpack.tf/profiles/76561198128792431#!/compare/1780012800/1780099200

Trade History Screenshot: https://imgur.com/a/TcpfBuT

Sold for 415 keys.

Sale 2:

Seller: https://backpack.tf/profiles/76561198128792431#!/compare/1780099200/1780185600

Buyer: https://backpack.tf/profiles/76561198340342204#!/compare/1780099200/1780185600

Trade History Screenshot: https://imgur.com/a/jIkoK5E

Sold for 435 keys, compares don't match because buyer purchased some of the keys on the day of the trade. Included trade history screenshot for clarity.

Sale 3:

Seller: https://backpack.tf/profiles/76561198340342204#!/compare/1782950400/1783036800

Buyer: https://backpack.tf/profiles/76561198128792431#!/compare/1782604800/1783036800

Trade History Screenshot: https://imgur.com/a/6ukhtNO

Sold for 435 keys, compares don't match because buyer (me) purchased some of the keys on the day of the trade. Included trade history screenshot for clarity.

To summarize: Bought from unboxer for 415 keys, sold for 435 keys the next day, repurchased from buyer for 435 keys about a month later.

Taking a range of 415 - 435. Feedback is welcome.