I updated the spartan for the last suggester but he hasn't resuggested it so... guess I will.

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Sale 1

Offered with ~8.5 key sweets for a circling heart defiant spartan (36-45) = 40.5 - 8.5 = 32 keys

Seller before: http://backpack.tf/profiles/76561198130390461?time=1434092400 (June 12th)

Seller after: http://backpack.tf/profiles/76561198130390461?time=1434783600 (June 20th)

Compare link: http://backpack.tf/profiles/76561198130390461?time=1434092400&compare=1434783600

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Sale 2

Sold for duped memory leak tyrantium helmet = 22 * 0.9 = 20 keys

Seller before: http://backpack.tf/profiles/76561198124772544?time=1434524400 (June 17th)

Seller after: http://backpack.tf/profiles/76561198124772544?time=1434610800 (June 18th)

Compare link: http://backpack.tf/profiles/76561198124772544?time=1434524400&compare=1434610800

• Mini on duped memory leak tyrantium helm:

  No recent sales I can track

  http://www.tf2outpost.com/trade/26128513 22 key BO unsold for 1 month

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Sale 3

Sold for miami nights tyrant's helm (31-35) = 33 * 0.9 = 30 keys

Seller before: http://backpack.tf/profiles/76561198071553799?time=1434783600 (June 20th)

Seller after: http://backpack.tf/profiles/76561198071553799?time=1434870000 (June 21st)

Compare link: http://backpack.tf/profiles/76561198071553799?time=1434783600&compare=1434870000

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Offers:

http://www.tf2outpost.com/trade/26386198 BO 29

gifted cauldron bubbles salty dog and 8 keys ~35

pro ks festive knife and pro ks festive ambassador ~27

http://www.tf2outpost.com/trade/26317501 BO 30

orb planets party phantom (outdated at 28.5) and sweets ~30?

smoking well-rounded rifleman - outdated at 37

gifted cauldron bubbles salty dog and 10 keys ~37

http://www.tf2outpost.com/trade/26257833 BO 40

(has current offers listed)

http://www.tf2outpost.com/trade/25552861 BO 40

stormy front runner - outdated at 32.5

flaming lantern scotsman's stove pipe -outdated at 30.5

stormy stainless pot ~25

miami capo's capper and 7 keys ~26

tf logo samur-eye ~28

aussie minigun and sweets ~21+

burning bombing run - outdated at 33

steaming cowl and planets one man army ~23

max's head ~24

cloud 9 towering titanium pillar - outdated at 38.5

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Overall, I believe there are enough offers above to discount 20 as a low outlier. Using the two sales and the 29 key seller for the range. Feedback welcome.