3 months old price. Many 15 key offers. Most selling between 13-15.

Offers:

14 keys: http://www.tf2outpost.com/trade/9826767 - willing to take 14 key offer

15 keys: http://www.tf2outpost.com/trade/9699597 - was actually willing to take 14 keys in mixed

15 keys: http://www.tf2outpost.com/trade/8122181 - multiple 15 key offers

19 keys: http://www.tf2outpost.com/trade/8872243 - willing to take 18, also has an offer of 16 keys

Actual Sales:

11 keys in unusuals - http://www.tf2outpost.com/trade/9772197 - sold for a blizzardy sultan (he added 9 keys) - he just really wanted a demo hat

13 keys - http://www.tf2outpost.com/trade/9905619

13 keys - http://www.tf2outpost.com/trade/9438299

14 keys - http://www.tf2outpost.com/trade/9774461

14 keys - http://www.tf2outpost.com/trade/9170775

15 keys - http://www.tf2outpost.com/trade/9600352 - rejected 14, sold for 15?

16 keys in items - http://www.tf2outpost.com/trade/9503156 - sold for strange original which was worth 15-17 at the time

16 keys in items - http://www.tf2outpost.com/trade/9316675 - sold for ap-sap which was worth 16 at the time

Conclusion: Outlier offer of 19 keys and outlier sale of 11 keys in unusuals. All others are selling from 13-15. Plus, there are people who will buy "any unusual" for 13 keys. No reason for the 11 key low end.