http://backpack.tf/classifieds/search/30027/6/0 - 3 for 3.66, 1 for 3.77, 1 for 3.88

http://www.tf2outpost.com/trade/11443124 - 3.66, willing 3.33

http://www.tf2outpost.com/trade/11439318 - 3.66

http://www.tf2outpost.com/trade/11439041 - 3.66

http://www.tf2outpost.com/trade/11438798 - 3

http://www.tf2outpost.com/trade/11444888 - 3

http://www.tf2outpost.com/trade/11435819 - The Sneaky Spats of Sneaking (3.33-3.55)

http://www.tf2outpost.com/trade/11434185 - 3.77 sold

http://www.tf2outpost.com/trade/11434082 - 3

http://www.tf2outpost.com/trade/11433869 - 3.55

http://www.tf2outpost.com/trade/11432288 - 3.66

http://www.tf2outpost.com/trade/11429611 - 3.77 sold

http://www.tf2outpost.com/trade/11427587 - 3

http://www.tf2outpost.com/trade/11427532 - 2 lol

http://www.tf2outpost.com/trade/11425290 - 2 lol

http://www.tf2outpost.com/trade/11422123 - 3.88, offer of 3.55, willing to do 3.66

http://www.tf2outpost.com/trade/11419071 - 3.33 sold

http://www.tf2outpost.com/trade/11416617 - 3.66

http://bazaar.tf/trade/244445 - 3.33

http://www.tf2outpost.com/trade/11412364 - 3.88 sold

http://www.tf2outpost.com/trade/11409572 - 3.77 sold one

http://www.tf2outpost.com/trade/11409184 - 3.33 (sold for byted beak, iz gud deal)

http://www.tf2outpost.com/trade/11410213 - Added 4 ref

http://www.tf2outpost.com/trade/11428309 - Sold 4 ref

http://www.tf2outpost.com/trade/11425285 - Sold 4 ref

http://www.tf2outpost.com/trade/11423716 - 4 ref willing buyer

http://www.tf2outpost.com/trade/11423222 - Sold 4 ref

Big jump down to 3.33, 4 ref seems to be possible in some cases. 3 ref is too uncommon, but it's also the reason I pick 3.33 instead of 3.66.