I can’t find anything for the 3rd. 1 and 2 are the 1st. 3 and 4 are the 2nd.

Sale 1) http://www.tf2outpost.com/trade/24986510 - Sold for a Max’s (3.3)

http://backpack.tf/profiles/76561198172535957?time=1423387806 (Incognito)

Pyromancer: http://backpack.tf/item/3384749943

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Sale 2) Sold for Haunted Ghosts Duped Trib (3.3) + 3 Keys (0.3 at the time)

Check his backpack. 400 -> 403 Keys

Trib: http://backpack.tf/item/143110892

Pyromancer: http://backpack.tf/item/3384749943 (Ignore the Dupe between Apolo and Legion)

3.3 * 0.9 = 2.97 (3) + 0.3 = 3.3

Trib Mini

http://backpack.tf/item/143110892 for Haunted Ghosts Fez (3.7)

Fez: http://backpack.tf/item/963480878

3.7 * 0.9 = 3/33 (3.3)

Fez Mini

1 Classified for 2.9, 4 for 4

http://www.tf2outpost.com/trade/25013755 --- Sold for 3 Pure (Added and asked)

(2.9 + 3 + 4 + 4 + 4 + 4) = 21.9 / 6 = 3.65 (3.7)

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Sale 3) http://www.tf2outpost.com/trade/24815974 --- Sold for Miami Valley Forge (2.5) + Sweets (51 Refined total)

Buds were 13 Keys, Keys were ~14.83 (51 / 14.83 = 3.4 / 13 = ~0.3)

2.5 + 0.3 = 2.8 * 0.9 = ~2.5

Valley Forge Mini

Sold for Terror Watt Skid Lid (2.8)

Valley: http://backpack.tf/item/3340826988

Skid: http://backpack.tf/item/3009148238

2.8 * 0.9 = ~2.5

Skid Mini

Sold for Mallard Cockswain’s (3.05)

Before: http://backpack.tf/profiles/76561198114113356?time=1422030656

After: http://backpack.tf/profiles/76561198114113356?time=1422086400

3.05 * 0.9 = ~2.8

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Sale 4) *Outlier* http://www.tf2outpost.com/trade/25007849 --- Sold for Vivid Plasma Danger

Danger Mini

http://www.tf2outpost.com/trade/25038179 --- Sold + Logo Dread (1) for a Miami KE (8.2)

X + (1 * 0.9) = 8.2

X + 0.9 = 8.2

X = 7.2

Logo Dread Mini

Classifieds for 1 Bud and 1.1 Buds

http://www.tf2outpost.com/trade/25138335 --- B/O of 10 Keys when Buds were 12 (~0.8)

http://www.tf2outpost.com/trade/24862693 --- B/O of 11 Keys when Buds were 13 (~0.9)

Sellers

http://www.tf2outpost.com/trade/25417400 --- B/O of 11 (1.1 Now)

http://www.tf2outpost.com/trade/25418487 --- B/O of 10 (1)

0.8 + 0.9 + 1 + 1 + 1.1 + 1.1 = 5.9 (~6) / 6 = 1

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If I made any problems, just comment them below.

Thanks! Spy

*Note: Even if 3 Keys weren't involved in Sale 2, 3 Buds falls in the range*