Alternative suggestion with proof of sellers at 10-10.5 keys.

Sellers:

http://tf2tp.com/trade.php?trade=9259478 - 10 keys - sold

http://www.tf2outpost.com/trade/9429933 - 10 keys - sold

http://tf2tp.com/trade.php?trade=9259458 - 10.5 keys - unsold

http://tf2tp.com/trade.php?trade=9262415 - 10.5 keys - unsold

http://www.tf2outpost.com/trade/9438000 - 10.5 keys - unsold - 10 key offer

http://www.tf2outpost.com/trade/9308614 - 10.5-11 key offer

http://www.tf2outpost.com/trade/9273770 - 10.5 key offers (twice)

http://www.tf2outpost.com/trade/9251636 - 10.75 key offer

http://www.tf2outpost.com/trade/9301535 - 11 key offer

http://www.tf2outpost.com/trade/9360240 - 11 keys (crate 40+sweets) - sold one for that

http://www.tf2outpost.com/trade/9248982 - 12 key offer

http://www.tf2outpost.com/trade/9332795 - 12 keys (Crate 40 + 2 keys) - sold

http://www.tf2outpost.com/trade/9097663 - 12 key offer 4 days ago (when there was hype, but 10.5 key offer made in the last day)

http://www.tf2outpost.com/trade/9248982 - 12 key offer 1 day ago

Buyers;

Successful Quickbuyers:

http://tf2tp.com/trade.php?trade=9261380 - bought for TS Bills

Will continue to post more proof. A ton of huntsman trades have offers of 10 keys and/or a white bills. 10 should definitely be low range. Plenty sold at 10.5 as shown above. And 11 keys is doable but a challenge. A rare 9 key, 12 key sell balances each other out.