After making mistakes resulting me remaking the suggestion twice I have now finally got everything correct, I must be really bad at this :c

The price of this unusual hasn't been changed for 2 years, gg.

Solds

http://www.tf2outpost.com/trade/25341464 (Sold just a day ago) ~ Sold for 21 keys pure (The guy told me how much he got it for on my 2nd suggestion)

http://www.tf2outpost.com/trade/25341124 (Sold just a day ago (Same hat as the first one)) ~ Sold for $47.00 (47/2.04 = 23 resulting in 23 keys)

The keys price was based on bp.tf's current key price in USD

The other sales that I found were sold on the SCM, I tried my best :l