3 months old price. Very rarely sold at high end price. I'm suggesting 10-10.5 keys because there are sellers at this price and rarely offers above. Although there are solds at 12 keys (6 months, one sale out of 4) aswell as 10.5 which is proving that 10.5 is possible. Although 12 keys is outlier. 1 at classified listings selling for 11.5 keys

Unsolds:

http://www.tf2outpost.com/trade/19324866 - 10 keys (Reserved, 1 day)

http://www.tf2outpost.com/trade/19312318 - 11,5 keys (2 days, offered 9 keys)

http://www.tf2outpost.com/trade/19263087 - 12 keys (4 days, no offers)

http://www.tf2outpost.com/trade/15840952 - 12 keys (4 months, offered 10 keys)

http://www.tf2outpost.com/trade/14592682 - 12 keys (6 months, 1 sold)

http://www.tf2outpost.com/trade/19356707 - 12 keys (5 hours, no offers)

http://www.tf2outpost.com/trade/19193023 - 10 keys (Gifted, offered 6 keys, 1 week)

Solds:

http://www.tf2outpost.com/trade/19329436 - Tried selling for b.m.o.c, sold for bubbling hard top (10.6 with overpay calculation)

http://www.tf2outpost.com/trade/19322331 - 10 keys

http://www.tf2outpost.com/trade/14592682 - 12 keys (1 sold out of 4 in 6 months, outlier)

http://www.tf2outpost.com/trade/16890575 - 8 keys (3 months ago, outlier)

Buying:

http://www.tf2outpost.com/search/203288079 - 9 keys

http://www.tf2outpost.com/trade/19091236 - 9 keys