using the classifieds as an example:

http://backpack.tf/classifieds/?item=Blood%20Banker&quality=6&tradable=1&craftable=1

2 selling for 5 ref, 1 selling for 5.33

and many are selling for 5.66-5.88

http://www.tf2outpost.com/trade/21220344 5.33

http://www.tf2outpost.com/trade/20738921 5.77

http://www.tf2outpost.com/trade/21230143 5.33

http://www.tf2outpost.com/trade/21319354 5.00

http://www.tf2outpost.com/trade/20869447 5.33

http://www.tf2outpost.com/trade/21160891 5.66

http://www.tf2outpost.com/trade/21263002 5.66

http://www.tf2outpost.com/trade/21310554 5.88

http://www.tf2outpost.com/trade/21014638 5.00

http://www.tf2outpost.com/trade/21315209 5.44

http://www.tf2outpost.com/trade/21305327 5.66

http://www.tf2outpost.com/trade/21035162 5.33

http://www.tf2outpost.com/trade/21091536 5.00

http://www.tf2outpost.com/trade/21293068 5.66

http://www.tf2outpost.com/trade/21165372 5.66

http://www.tf2outpost.com/trade/21274296 5.00

http://www.tf2outpost.com/trade/21127294 5.00

http://www.tf2outpost.com/trade/21299769 5.00

almost everything from outpost!

Unsold at 6 Ref:

http://www.tf2outpost.com/trade/21264325 2 days

http://www.tf2outpost.com/trade/21300827 21 hrs ago

http://www.tf2outpost.com/trade/21267675 2 days

http://www.tf2outpost.com/trade/21294213 1 day

http://www.tf2outpost.com/trade/21291013 1 day

http://www.tf2outpost.com/trade/21009483 1 week

http://www.tf2outpost.com/trade/21279009 1 day

http://www.tf2outpost.com/trade/21299398 1 day

http://www.tf2outpost.com/trade/21255319 2 days

http://www.tf2outpost.com/trade/21127383 1 week

http://www.tf2outpost.com/trade/21132321 1 week

http://www.tf2outpost.com/trade/21145053 1 week

http://www.tf2outpost.com/trade/21260432 2 days

http://www.tf2outpost.com/trade/21187190 5 days

http://www.tf2outpost.com/trade/20603278 3 weeks

http://www.tf2outpost.com/trade/21248312 3 days

http://www.tf2outpost.com/trade/21192855 5 days

http://www.tf2outpost.com/trade/21087975 1 week

http://www.tf2outpost.com/trade/21215803 4 days

http://www.tf2outpost.com/trade/21194850 5 days

http://www.tf2outpost.com/trade/21135866 1 week

http://www.tf2outpost.com/trade/21208112 4 days

re opened with a range :D

EDIT: as someone asked for more proof, here we go