1 month old price. Needs a bump. Proof below.

None at classifieds below 4 at moment of posting.

Quicksells at 3,66:

http://www.tf2outpost.com/trade/15808553 - Not in bp. (3,66 ref on first row in his bp)

http://i.imgur.com/6OQZkbF.png - Within hours. Not in his bp -> http://backpack.tf/profiles/76561198083201019

http://www.tf2outpost.com/trade/15804640 - Without a bump.

http://www.tf2outpost.com/trade/15775214 - ^

http://www.tf2outpost.com/trade/15718070 - ^

Solds/Offers/Buyers at 4 ref and above:

http://www.tf2outpost.com/trade/15793567 - Not in bp.

http://i.imgur.com/2ehPGGW.png - I added 2,11 for a key. (~4)

http://www.tf2outpost.com/trade/8025421 - Old trade but recent offer of 4 ref

http://www.tf2outpost.com/trade/15796698 - Buyer for 4 ref in items.

http://www.tf2outpost.com/trade/10040475 - Old trade but 4 interested buyers at 4 ref in the past 10 days ..

http://www.tf2outpost.com/trade/15743290 - 4 ref offer / Rejected 3,66

http://www.tf2outpost.com/trade/15699473 - ^

http://www.tf2outpost.com/trade/15798776 - 4 ref offer

http://www.tf2outpost.com/trade/15632437 - 4,11 ref offer

http://www.tf2outpost.com/trade/15702717 - Sold for 5 ref!

http://www.tf2outpost.com/trade/15779530 - One guy offered a game for it. (The game goes for around a key.)

Conclusion: Only 2 pages on OP. Below 4 going quick. Needs a bump. :)