Sale 1:

Sold for 9 keys

No outpost link available

Seller: http://backpack.tf/profiles/76561198023542389/#!/compare/1456646400/1456732800

Buyer: http://backpack.tf/profiles/76561198069191892/#!/compare/1450771200/1457078400

X = 9

Sale 2:

Sold for:

7 keys (7)

Strange Part: Kills (1.75)

Spec. KS Air Strike (0.9)

Prehistoric Pullover (0.5)

3.88 ref (0.2)

Digit Divulger (0.1)

http://www.tf2outpost.com/trade/27902773 - B/O of 8.7

Seller: http://backpack.tf/profiles/76561198067007496/#!/compare/1456560000/1456646400

Buyer: http://backpack.tf/profiles/76561198241036780/#!/compare/1456560000/1456646400

X = 7 + 1.75 + 0.9 + 0.5 + 0.2 + 0.1

X = 10.45

Capped by B/O of 8.7

Rounding to 9

Sale 3:

Looks to have sold for 8 keys

http://www.tf2outpost.com/trade/27877124 - B/O of 9

Seller: http://backpack.tf/profiles/76561198084736296/#!/compare/1456041600/1456387200

Buyer: http://backpack.tf/profiles/76561198023542389/#!/compare/1456300800/1456387200

X = 8

Sale 4:

Sold for 3 keys + Strange Killstreak Diamond Botkiller Scattergun w/ ~8 keys in parts (3)

http://www.tf2outpost.com/trade/27708659 - B/O of 9

Seller: http://backpack.tf/profiles/76561198159154880/#!/compare/1455696000/1455955200

Buyer: http://backpack.tf/profiles/76561198084736296/#!/compare/1455609600/1455955200

There is a diamond botkiller scattergun seller with ~6 keys in parts unsold at 3 keys for a month, i doubt this scattergun would be much more here.

X = 3 + 3

X = 6

Sellers:

http://www.tf2outpost.com/trade/27224816 - Offers, 4 months

Buyers:

http://puu.sh/nO82Y/17cf7ff546.png

1 x 8.5

3 x 8

8 is too low to be used

Sales at:

9 (pure)

9 (80% pure)

8 (pure)

6 (50% pure)

Going with 9 flat