So with 16 in existence, there is only one valid sale i could find. Hmmmm...

1 year outdated.

Sales

Sale 1

Sold for ~27 keys in mixed items.

http://backpack.tf/profiles/76561198119908840/#!/compare/1454832000/1454918400

http://www.tf2outpost.com/trade/27761623 ---- B/O was 22 keys

=======> 22 keys

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Sale 2

Bulk for Stormy 13th Engie Cap.

http://backpack.tf/profiles/76561198119908840/#!/compare/1457164800/1457424000

=======> Using it to update the Engie Cap

==============================================================================================================

Seller

http://imgur.com/wSBQQkh ----- Seller for 25 keys (young).

Summary

- A sale for 22 keys and a seller for 25 keys.

Going with 22 keys flat. Criticism appreciated!