Sale:

http://www.tf2outpost.com/trade/13896010 3 key 2 ref

No sale:

http://www.tf2outpost.com/trade/13846531 3.5 key | no bump never

http://www.tf2outpost.com/trade/13912485 4 key | 1 day old | bump today last

http://www.tf2outpost.com/trade/13786497 4 key | 6 day old | bump today last

http://www.tf2outpost.com/trade/13786601 4 key | 6 day old | bump today last

http://www.tf2outpost.com/trade/13725752 4 key | 1 week old | bump today last

0.5 key = 3 refined

http://www.tf2outpost.com/trade/13864154 4 key 2 ref | 2 day old | bump today last

http://www.tf2outpost.com/trade/13815417 4.3 key | 5 day old | bump 2 day back last

http://www.tf2outpost.com/trade/13801748 4 key 3 ref | 6 day old | bump today last

http://www.tf2outpost.com/trade/13131672 4 key 3 ref | 4 week old | bump 2 day back last

I think one make 3.5-4 key, but trade.tf no told that. It tell 4 key only. I make suggest that.