Cheers Foamy for pointing out my error

Sale 1:

Sold for Spec. KS Australium Minigun + 10 keys

http://www.tf2outpost.com/trade/27843625 - B/O of 27

Seller: http://backpack.tf/profiles/76561198006544512/#!/compare/1456473600/1456560000

Buyer: http://backpack.tf/profiles/76561198107239584/#!/compare/1456041600/1456560000

X = 21 + 10

X = 27 (Capped by B/O)

Sale 2:

Sold for Duped Flaming Lantern Rimmed Raincatcher

http://www.tf2outpost.com/trade/27921980 - B/O of 26

Seller: http://backpack.tf/profiles/76561197980999033/#!/compare/1458025200/1458111600

Buyer: http://backpack.tf/profiles/76561198029627595/#!/compare/1458025200/1458111600

X = 29 26 - Capped by B/O (This is the forementioned error)

Sale 3:

Sold for Circling Heart Tipplier’s Tricorne

http://www.tf2outpost.com/trade/27695962 - B/O of 27

Seller: http://backpack.tf/profiles/76561198047433991/#!/compare/1456041600/1456128000

Buyer: http://backpack.tf/profiles/76561198143265931/#!/compare/1456041600/1456128000

X = 22

Sale 4:

Sold for 20 keys

http://www.tf2outpost.com/trade/27972037 - B/O of 25

Seller: http://backpack.tf/profiles/76561198029627595/#!/compare/1458630000/1458716400

Buyer: http://backpack.tf/profiles/76561198042938501/#!/compare/1458630000/1458716400

X = 20

Sale 5: (Dupe)

Sold for Aces High Attendant

http://www.tf2outpost.com/trade/27781754 - B/O of 27

Seller: http://backpack.tf/profiles/76561198046167937/#!/compare/1458111600/1458370800

Buyer: http://backpack.tf/profiles/76561198160291216/#!/compare/1458111600/1458198000

Cannot find valid sales on the attendant, can be used to update it.

Raincatcher Mini:

Sale 1:

Sold for TF Logo Scotch Bonnet

http://www.tf2outpost.com/trade/27916916 - B/O of 30

Seller: http://backpack.tf/profiles/76561198193582843/#!/compare/1457683200/1457769600

Buyer: http://backpack.tf/profiles/76561198152914833/#!/compare/1457683200/1457769600

X = 30

Sale 2:

Sold in less than a day for TF Logo le Party Phantom

No outpost link available

Seller: http://backpack.tf/profiles/76561198152914833/#!/compare/1457683200/1457769600

Buyer: http://backpack.tf/profiles/76561198119936533/#!/compare/1457683200/1457769600

X = 28

Sale 3:

Sold for Peace Sign Thirst Blood + Mannrobics in a day

Seller: http://backpack.tf/profiles/76561198137227563/#!/compare/1456646400/1456732800

Buyer: http://backpack.tf/profiles/76561198180074433/#!/compare/1456646400/1456732800

X = 20 + 2

X = 22

Sale 4:

Sold with 8.5 keys in items for Green Energy Sola Topi

Seller: http://backpack.tf/profiles/76561198180074433/#!/compare/1456992000/1457337600

Buyer: http://backpack.tf/profiles/76561198193582843/#!/compare/1456905600/1456992000

X + 8.5 = 26.5

X = 18

Taking 28-30 (29) for the Raincatcher, considering how quickly sale 3 happened

Buyers:

18.9:

http://www.tf2outpost.com/trade/28008054

20 keys:

http://www.tf2outpost.com/trade/27952726

http://www.tf2outpost.com/trade/26632023

20 is low

Sellers:

27 keys:

http://puu.sh/ohzIn/d32c64dd61.png - 21 days

http://www.tf2outpost.com/trade/27884401 - 1 month, poorly bumped (25 views at the time)

Sales at:

20 (Countered by buyers)

22

26

27

22 is an outlier

Going with 26-27