Well, I'm very drugged happy, so I'm doing another easy and predictable suggestion! Oh, and thanks to Sreauta Breu~ for some links from his suggestion.

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

*1 x 0.22.

*12 x 0.33.

*1 x 0.37.

*11 x 0.44.

*17 x 0.55.

SELLING FOR 0.33

http://www.tf2outpost.com/trade/20791846 - 0.11 (Quicksold)

http://www.tf2outpost.com/trade/20794726 - 0.22 (Quicksold)

http://www.tf2outpost.com/trade/20791533 - 0.22 (Quicksold)

http://www.tf2outpost.com/trade/20793005 - 0.22

http://www.tf2outpost.com/trade/20795145 - 0.22

http://www.tf2outpost.com/trade/20797124 - Young

http://www.tf2outpost.com/trade/20796802 - Young

http://www.tf2outpost.com/trade/20795820

http://www.tf2outpost.com/trade/20795263

http://www.tf2outpost.com/trade/20792734

http://tf2tp.com/trade.php?trade=10170514

http://www.tf2outpost.com/trade/20742146 - Sold 1.

http://www.tf2outpost.com/trade/20745480

SELLING FOR 0.44

http://www.tf2outpost.com/trade/20797231 - Young

http://www.tf2outpost.com/trade/20797207 - Young

http://www.tf2outpost.com/trade/20729650

http://www.tf2outpost.com/trade/20617965

UNSOLD FOR 0.55

http://www.tf2outpost.com/trade/20791797

http://www.tf2outpost.com/trade/20791490

http://www.tf2outpost.com/trade/20769582 - 1 Day.

http://www.tf2outpost.com/trade/20744468 - 1 Day.

http://www.tf2outpost.com/trade/20692605 - 3 Days.

http://www.tf2outpost.com/trade/20676723 - 3 Days.

http://www.tf2outpost.com/trade/20703023 - 3 Days.

Conclusion: 0.33 and 0.44 are still common trade points, but 0.55 doesn't sell anymore.

As always, sorry for the bad english, extra-proof is always appreciate, counter-proof is welcome. Comments like "Bad proof, downvote!" aren't useful. If you downvote, explain why. If you upvote, comment that!.