There is no way that the higher end shall remain at 6 ref, too many unsold at that price. Lower range remain at 4.66. Proofs below:

Selling for 4.66 ref:

http://www.tf2outpost.com/trade/8723711 (added)

Selling for 5 ref:

http://www.tf2outpost.com/trade/8776100 (1 key 1.33 ref)

Selling for 5.33 ref:

http://www.tf2outpost.com/trade/8723744 (3 days)

http://www.tf2outpost.com/trade/8739823 (2 days)

Unsold for 5.66 ref:

http://www.tf2outpost.com/trade/8561694 (1 week)

http://www.tf2outpost.com/trade/8694904 (4 days)

http://www.tf2outpost.com/trade/8779886 (13 hours)

http://www.tf2outpost.com/trade/8417892 (2 weeks)

http://www.tf2outpost.com/trade/8604903 (1 week)

Unsold for 6 ref:

http://www.tf2outpost.com/trade/8727315 (2 days ago)

http://www.tf2outpost.com/trade/8786264 (2 hours)

http://www.tf2outpost.com/trade/8732428 (2 days)

http://www.tf2outpost.com/trade/8767011 (1 day)

http://www.tf2outpost.com/trade/8751982 (1 day)

http://www.tf2outpost.com/trade/8718891 (3 days)

http://www.tf2outpost.com/trade/8660166 (5 days)

http://www.tf2outpost.com/trade/8743093 (2 days)

Being offered 5 ref:

http://www.tf2outpost.com/trade/8462697

http://www.tf2outpost.com/trade/8472651 (seller willing to do 5.33)