Classifieds :

http://imgur.com/GS35OQB

2 sellers at 1,55 ref (both have mobile auth.)

1 buyer at 1,44 ref

Unsold :

http://www.tf2outpost.com/trade/27926689 - 1,33 ref (4 days, buyer at 1,44 ref in classifieds counters)

Sale :

1,66 ref

http://backpack.tf/profiles/76561198055088168?time=1456992000 - 2 in stock (type "hunger" in the search bar)

http://backpack.tf/profiles/76561198055088168?time=1457596800 - 1 in stock (type "hunger" in the search bar)

Conclusion :

Less than 5% change but with such small market and 2 sellers at 1,55 ref I think 1,55 ref should be included in the price.