Classifieds: http://gyazo.com/66e7b13e019af8aafaed1a0dadeff7c8

2 x 2 keys

Sellers

http://www.tf2outpost.com/trade/24264071 - 2 keys / 3 days

http://www.tf2outpost.com/trade/24001008 - 2 keys 1 ref / 2 weeks

http://www.tf2outpost.com/trade/24285135 - 2 keys 1 ref / 2 days

http://www.tf2outpost.com/trade/24222831 - 2 keys 4 ref / 6 days ^^ actually same guy as above...

http://www.tf2outpost.com/trade/24151829 - 2 keys 3 ref / 1 week ^^ also same guy...

http://www.tf2outpost.com/trade/24302212 - bp.tf price / young

http://www.tf2outpost.com/trade/24257060 - bp.tf price / unbumped

2 other sellers at 3 keys, and that's all the sellers.

Pricesfor people that are too lazy to do math:

2 keys 1 ref = 2.06 keys ~2.1 keys

2 keys 2 ref = 2.11 ~2.1 keys

2 keys 3 ref = 2.17 ~2.2 keys

2 keys 4 ref = 2.23 ~2.2 keys