http://www.tf2outpost.com/trade/7445280 - looks like he sold it for a hearts pith, was rejected first but later must have been taken. There is evidence he added keys for it also (1.9 unusuals not counting the added keys)

http://www.tf2outpost.com/trade/7711665 - c. bubbles demofro (2.3 unusuals)

http://www.tf2outpost.com/trade/7928076 ->

"pink confetti spartan + blizzardy storm pickelhaube for bombing run?" (3 in unusuals??? didnt expect to find it that much O_O)

http://www.tf2outpost.com/trade/7971256 - sold for quite alot it seems:

steam anger + o. fire pencil + planets berliners. Im too lazy to look up all those atm but definately above everything else so far. Guy was the original owner so maybe he bought it back for sentiment?

Past one month+ sales include 2 pure, vivid milkman, ?logo tossle

2-2.6 can be suggested, playing it safe. High end really basically based off the 2 recent offers