Proof:

http://www.tf2outpost.com/trade/14825160 - Sold for 1 key 1 ref in less than a day (shows on trade.tf, too lazy, you can just ignore this one)

http://www.tf2outpost.com/trade/14826317 - Sold for 1 key 1 ref in less than a day

http://www.tf2outpost.com/trade/14789931 - Sold for 1 key 1 ref in less than a day

http://tf2tp.com/trade.php?trade=9820276 - Sold for 1.33

http://www.tf2outpost.com/trade/14729860 - Sold at least 1 for 1.5 ( http://www.tf2outpost.com/backpack/364664 )

http://www.tf2outpost.com/trade/14734148 - Sold 1 for 2

http://www.tf2outpost.com/trade/14437216 - Claims he sold 13 for 2, sold few for sure

Not a lot of proof to gather and seem to be possible to sell at even higher than 1.2

At the moment of posting Classifieds had 0 below 1.5