Only one recent sale.

While this is a dupe, I'll use a comment from the previous owner's trade to explain the scenario:

http://www.tf2outpost.com/trade/24946513

"Darkblaze Powdered Practitioner: b/o 80 keys

--Duped, one of four dupes, but all other dupes have stayed put since (at last check) August 2014. The single non-duplicated one has apparently never come on the market."

Sold for a stormy stash (56) + 25 pure. 81*.9 = 73 keys.

His bp:

http://backpack.tf/profiles/76561198056080374?time=1431673200 ->

http://backpack.tf/profiles/76561198056080374?time=1431759600

My bp:

http://backpack.tf/profiles/76561198025114705?time=1431673200 ->

http://backpack.tf/profiles/76561198025114705?time=1431759600