wanted to do this earlier, but not proof, so had to do this rather late.

http://www.tf2outpost.com/trade/9619943 sold for a key

http://www.tf2outpost.com/trade/13684384 sold for a key pretty fast

http://www.tf2outpost.com/trade/13672285 sold for a key pretty fast

http://www.tf2outpost.com/trade/13651028 sold for a key rather fast

http://www.tf2outpost.com/trade/13686982 sold for 5.77 ref in 5 hours

http://www.tf2outpost.com/trade/13451303 soldout at a key

http://www.tf2outpost.com/trade/12996564 does not reply at a key

http://www.tf2outpost.com/trade/13234284 add at key + ref

http://www.tf2outpost.com/trade/12864529 key + ref offer

http://www.tf2outpost.com/trade/12195940 sold some for key + ref

http://www.tf2outpost.com/trade/13692631 offer of lime + 2 ref

key goes rather fast, key + ref is possible, explains it all.