Just getting out a few suggestions before I go on vacation…

Recent sales:

http://www.tf2outpost.com/trade/25656515 2.11 ref

http://www.tf2outpost.com/trade/25633830 2 ref

http://www.tf2outpost.com/trade/25720652 2 ref

http://www.tf2outpost.com/trade/25727971 2 ref, from last suggestion, credit to MoPcKo

http://i.imgur.com/yX0viMV.png - 2

bp on 17.04 - http://backpack.tf/profiles/76561198055088168?time=1429254000 - 1 (lvl 56) in bp

bp on 18.04 - http://backpack.tf/profiles/76561198055088168?time=1429340400 - 1 (lvl 99) in bp - Sold 1, Added 1 Credit to MoPcKo from last suggestion.

Sellers:

http://www.tf2outpost.com/trade/25756834 1.66 ref (Young, but I will re-suggest if it doesn't quicksell)

http://www.tf2outpost.com/trade/25731523 1.77 ref

http://www.tf2outpost.com/trade/25759590 1.88 ref (Young)

Buyers:

http://www.tf2outpost.com/trade/25736474 Backpack.tf price (Unbumped)

Offers (Support proof):

http://www.tf2outpost.com/trade/25545561 Got offered 2.33 ref (But retracted and hasn't sold yet)

Althought it is quite an ugly range :P, with sales as 2.11 and 2 ref, no valid sellers at 1.66 ref, and an unsold at 1.77 ref, the range of 1.77 ref to 2.11 ref should suffice.