Sale #1 (December 30th):

Gym Rat > 1 bud + 4 keys

Seller's BP:

Before: http://backpack.tf/profiles/76561198152090079?time=1419840000

After: http://backpack.tf/profiles/76561198152090079?time=1419926400

Buds = 13 keys

4 / 13 = 0.3

1 + 0.3 = 1.3

1.3

Possible quicksale or outlier? The seller never listed it on Outpost, and the buyer doesn't even use Outpost.

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Sale #2 (December 29th):

Gym Rat > 2 buds

Gym Rat: http://www.tf2outpost.com/trade/24364332

Buds: http://www.tf2outpost.com/trade/24364428

2

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Sale #3 (November 10th):

Gym Rat + S. Cute Suit (3 keys) + S. Sight for Sore Eyes (3.5 keys) + S. YER (1 key) + S. DR (1 key) > DBD Bolted Bicorne (2.7*)

Gym Rat: http://www.tf2outpost.com/trade/23579203

DBD Bolted Bicorne: http://www.tf2outpost.com/trade/22893598 (B/O was 3)

Buds = 15.5 keys

Values of items added:

3 + 3.5 + 1 + 1 = 8.5 keys = 8.5 / 15.5 = 0.548 = 0.55 buds

Seller's BP:

Before: http://backpack.tf/profiles/76561198049730525?time=1415606400

After: http://backpack.tf/profiles/76561198049730525?time=1415779200

Buyer's BP:

After: http://backpack.tf/profiles/76561198027882328?time=1415779200

2.7 * 0.9 = 2.43 - 0.55 = 1.88 = 1.9

1.9

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Sale #4 (November 3rd):

Gym Rat > Vintage Bill's (1.45)

Quicksale!

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Minis:

DBD Bolted Bicorne:

http://www.tf2outpost.com/trade/24056297 35 key B/O

Buds = 13 keys

35 / 13 = 2.7

2.7

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Sellers:

http://www.tf2outpost.com/trade/24345385 nothing under 2 buds

http://i.imgur.com/ouP587m.png . . . . . . . 2 buds in classifieds

With 2 valid sales at 1.9 and 2, 2 flat should work fine.