Good morning! Upper range is no more needed. Proof below:

Selling for less than 2,66ref:

http://www.tf2outpost.com/trade/13822520 (2,55ref, 20 hours)

classified: http://imageshack.us/f/27/hir0.png/ (2,33ref and 2,55ref seller for several days)

Selling for 2,66ref:

http://www.tf2outpost.com/trade/13788210 (2 days)

http://www.tf2outpost.com/trade/13754592 (3 days)

http://www.tf2outpost.com/trade/13751338 (3 days)

http://www.tf2outpost.com/trade/13819287 (24 hours)

http://www.tf2outpost.com/trade/13800165 (1 day)

http://www.tf2outpost.com/trade/13840275 (1 hour)

http://www.tf2outpost.com/trade/13814057 (1 day)

http://www.tf2outpost.com/trade/13839109 (1 hour)

http://www.tf2outpost.com/trade/13815289 (2 hours)

http://www.tf2outpost.com/trade/13831905 (8 hours)

classified: http://imageshack.us/f/27/hir0.png/ (several 2,66ref sellers)

Unsold for 3,00ref:

http://www.tf2outpost.com/trade/13806305 (1 day)

http://www.tf2outpost.com/trade/13757474 (3 days)

http://www.tf2outpost.com/trade/13797145 (2 days)

http://www.tf2outpost.com/trade/13695342 (5 days)

http://www.tf2outpost.com/trade/13612972 (7 days)

http://www.tf2outpost.com/trade/13759441 (3 days)

http://www.tf2outpost.com/trade/13794251 (2 days)

http://www.tf2outpost.com/trade/13804905 (1 day)

http://www.tf2outpost.com/trade/13838604 (2 hours)

http://www.tf2outpost.com/trade/13679766 (6 days)

http://www.tf2outpost.com/trade/13755951 (3 days)

http://www.tf2outpost.com/trade/13827892 (15 hours)

http://www.tf2outpost.com/trade/13798272 (1 day)

http://www.tf2outpost.com/trade/13754961 (3 days)

http://www.tf2outpost.com/trade/13735907 (4 days)

http://www.tf2outpost.com/trade/13813264 (1 day)

http://www.tf2outpost.com/trade/13807293 (1 day)

http://www.tf2outpost.com/trade/13646403 (7 days)

Summa summarum:

There's just a massive amount of sellers for 2,66ref, so it's not a surprise for anyone that the 3,00ref sellers are having a extremely hard time. And to be honest, only the sheer amount of 2,66ref sellers is a clear sign of the fact that the upper range should be removed. So, feel free to hit the upvote (hopefully you'll hit that one) button.

Constructive criticism and feedback is always welcome, so I'll know what to improve, if I happen to make new suggestions in the future.