Small bump up.

Sold for 10 Keys

http://i.imgur.com/bmsKCSp.jpg

Sold for 15 Keys(Although the B/O was 11, it also sold quickly, and had 3 willing buyers above it's price. Ignoring B/O rule)

http://www.tf2outpost.com/trade/25344182

Sold for 12.5 Keys

http://i.imgur.com/h9y6hYX.png

Sold for 24 Keys, Outlier

http://i.imgur.com/6d48CI2.png

24 Seems discreptant, the rest of the sales(10-15) seem to fit just fine, with 12.5 also being the median.

Additional Proof/Counter-Proof/Constructive Criticism/Feedback is always appreciated.