Update time? It was a nightmare looking for sales.

Sale 1:

Looks like it sold for 44 keys pure

http://backpack.tf/profiles/76561197967929435?time=1432278000 - before

http://backpack.tf/profiles/76561197967929435?time=1432710000 - after

Sale 2:

Sold for a Sulph Trilby

http://backpack.tf/item/1688949143 - trilby

Mini:

trilby + http://backpack.tf/item/2660773745 sold for http://backpack.tf/item/2817935632

Considering the value of the Chieftain, I will call it invalid?

Sale 3:

Sold for SF Pro KS Scattergun? http://backpack.tf/item/645525701

Can't tell.

Sale 4:

Sold for http://backpack.tf/item/1707407878 and http://backpack.tf/item/1345387882 (25.5+21=46.5*.9=41.85 round to 42)

Since 42 keys doesn't sound too far off of what most people are selling for, I'm considering it valid.