Credit to Hex for showing me some of these.

1x I have no clue what happened.

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Sale 1:

The Item: http://backpack.tf/item/2582636167

Seller: http://backpack.tf/profiles/76561198005590158?time=1422432000

Buyer: http://backpack.tf/profiles/76561198069580309?time=1422432000

Sold for a Frostbite Hermes + 30 keys: http://backpack.tf/item/3301819762

4.6 - 2.3 (30 keys) = 2.3

Credit to Julia for showing me this error.

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Sale 2:

The Item: http://backpack.tf/item/2419354588

Seller: http://backpack.tf/profiles/76561198065210814?time=1421481600

Buyer: http://backpack.tf/profiles/76561198092274544?time=1421568000

Sold for a Miami Nights Cold Killer: http://backpack.tf/item/2200091880

(Without paint price) 2.75*0.9 = 2.475 (Rounded to 2.5 buds)

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Sale 3:

The Item: http://backpack.tf/item/2419354588

Seller: http://backpack.tf/profiles/76561198092274544?time=1421827200

Buyer: http://backpack.tf/profiles/76561198127289588?time=1421841399 (Doesn't show in inventory for some reason, just look at the item history)

Sold for a Holy Grail Taunt: Party Trick: http://backpack.tf/item/3422323336

3*0.9 = 2.7 buds

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Sale 4 {outlier & too complicated}:

(See Mini#1)

The Item: http://backpack.tf/item/2419354588

Seller: http://backpack.tf/profiles/76561198127289588?time=1421841399 (Doesn't show in inventory for some reason, just look at the item history)

Buyer: http://backpack.tf/profiles/76561198074100425?time=1421866784

Sold for a Pink as Hell Antarctic Parka: http://backpack.tf/item/3235868569 , Pink as hell Mistaken Movember: http://backpack.tf/item/3291883209 & Gifted+Duped Dr's Dapper Topper: http://backpack.tf/item/2162691533

Parka: (Using backpack.tf recommended price) 17.15 refined

Movember: (Using backpack.tf recommended price) 10.48 refined

Topper (See Mini #1) (Without paint price) 1.4 buds

So; (17.15+10.48)/13.17 = 2.09 (Rounded to 2.1 keys)

2.1/14 = 0.15 (Rounded to 0.2 buds)

1.4+0.2 = 1.6 buds

Keys were 13-13.33 at the time: http://backpack.tf/vote/id/54a95e67b88d88b7768b4684

Buds were 14 keys are the time: http://backpack.tf/vote/id/54c0107fb98d88d9468b462c

THESE ARE WHAT I THOUGHT THE PRICES ARE, IF I GET ANY WRONG PLEASE TELL ME.

This sale (for me) was complicated, I was bound to do something wrong. If I did, please tell me.

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Minis:

Gifted+Duped Topper: Sold for a Stormy Storm Chieftain's Challenge: http://backpack.tf/item/542841816

Seller: http://backpack.tf/profiles/76561198074921500?time=1420893750

Buyer: http://backpack.tf/profiles/76561198074100425?time=1421689924

1.55*0.9 = 1.395 (Rounded to 1.4 buds)

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As always, please try and keep the comments relevant, please don't make comment comprised only of "upvote" or "downvote". Counter-proof / supportive proof is always appreciated!