Anything below 5 is a quicksell (doesn't belong in range yet)

2.33:

http://www.tf2outpost.com/trade/14946349 - sold

3 ref:

http://www.tf2outpost.com/trade/14952809 - sold

http://www.tf2outpost.com/trade/14944585 - sold

http://tf2tp.com/trade.php?trade=9827377 - sold

http://www.tf2outpost.com/trade/14954208 - bought (instantly?)

http://www.tf2outpost.com/trade/14937307 - sold

http://www.tf2outpost.com/trade/14936817 - sold

http://www.tf2outpost.com/trade/14933734 - sold

4 ref:

http://www.tf2outpost.com/trade/14953567 - sold

http://www.tf2outpost.com/trade/14944635 - sold

http://www.tf2outpost.com/trade/14943948 - sold

http://www.tf2outpost.com/trade/14940447 - sold

Selling at 5 ref:

http://www.tf2outpost.com/trade/14982636 - 1 day (sold)

http://www.tf2outpost.com/trade/14980160 - 1 day (not sold, offered 5 ref recently and not taken yet)

http://www.tf2outpost.com/trade/14941708 - Sold for 5.33 ref

http://www.tf2outpost.com/trade/14942456 - Sold for 5 ref

http://www.tf2outpost.com/trade/14944425 - Sold for 5 ref

http://www.tf2outpost.com/trade/14935507 - Sold for 5 ref

http://www.tf2outpost.com/trade/14949946 - 5.66, unsold 1 day

1 key unsolds

http://www.tf2outpost.com/trade/14983749 (12 hours)

http://www.tf2outpost.com/trade/14982732 (12 hours)

http://www.tf2outpost.com/trade/14978342 (1 day)

http://www.tf2outpost.com/trade/14972716 (1 day)

http://www.tf2outpost.com/trade/14985194 (11 hours)

http://www.tf2outpost.com/trade/14956441 (2 days)

http://www.tf2outpost.com/trade/14985015 (1 day)

http://www.tf2outpost.com/trade/14974570 (1 day)

http://www.tf2outpost.com/trade/14972081 (1 day)

http://www.tf2outpost.com/trade/14970967 (1 day)

A few (3-4) of those are underbumped, but most of the older ones are autobumped yet not taken. Shortening the range conservatively.