Sellers

http://www.tf2outpost.com/trade/24777836 - 1.1

http://www.tf2outpost.com/trade/24794354 - 1.1 / young

http://www.tf2outpost.com/trade/24771123 - 1.1

http://www.tf2outpost.com/trade/24789519 - 1.1 / young

http://www.tf2outpost.com/trade/24788274 - 1.1 / young, unbumped

Unsolds

http://www.tf2outpost.com/trade/24791175 - young

http://www.tf2outpost.com/trade/24778946 - 1 day

http://www.tf2outpost.com/trade/24744655 - 3 days

http://www.tf2outpost.com/trade/24696652 - 6 days

http://www.tf2outpost.com/trade/24601364 - 1 week

For those that are too lazy to use a calculator

1 key + 1 ref => 1.07 keys, rounded up to 1.1 keys

1 key + 2 ref => 1.14 keys, rounded up to 1.1 keys

1 key + 3 ref => 1.21 keys, rounded up to 1.2 keys

Making it 1.1 flat because I have enough proof to show that 1.2 doens't sell.