http://www.tf2outpost.com/trade/7975591 - Sold for 2.33 o.o

http://www.tf2outpost.com/trade/7968690 - Sold 3 for 2 ref each

http://www.tf2outpost.com/trade/8032171 - Sold for 2 ref

http://www.tf2outpost.com/trade/7558470 - Sold for 2 ref

http://www.tf2outpost.com/trade/7873468 - Sold for 2 ref

http://www.tf2outpost.com/trade/7082677 - Sold for 2 ref

http://www.tf2outpost.com/trade/7703729 - Sold for 2 ref

http://www.tf2outpost.com/trade/7847011 - Talked with him, sold for 2 ref.

http://www.tf2outpost.com/trade/7715112 - Got offered 2 ref

http://www.tf2outpost.com/trade/7932412 - Someone added him for this price

http://www.tf2outpost.com/trade/7094970 - Sold for 1.77

http://www.tf2outpost.com/trade/7691758 - Sold for 1.77

Seems Demand for these has increased; people are willing to pay and sometimes even offer 2 ref for them. Adding the range seemed a logical thing to do.