Sale 1

Sold with bill's hat (~2.5) for smoking festive tree (20-23) and specialized aussie smg (~10 keys) = ((21.5 + 10) * 0.9) - 2.5 = 26 keys

Seller before: http://backpack.tf/profiles/76561198058803490?time=1444460400 (October 10th)

Seller after: http://backpack.tf/profiles/76561198058803490?time=1444546800 (October 11th)

Compare link: http://backpack.tf/profiles/76561198058803490?time=1444546800&compare=1444460400

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Sale 2

Sold for 28 keys

http://www.tf2outpost.com/trade/27126495

Seller before: http://backpack.tf/profiles/76561198128606394?time=1443337200 (September 27th)

Seller after: http://backpack.tf/profiles/76561198128606394?time=1443510000 (September 29th)

Compare link: http://backpack.tf/profiles/76561198128606394?time=1443337200&compare=1443510000

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Sale 3

Quicksold for 23 keys

http://www.tf2outpost.com/trade/27125002

Seller before: http://backpack.tf/profiles/76561198080179568?time=1443250800 (September 26th)

Seller after: http://backpack.tf/profiles/76561198080179568?time=1443337200 (September 27th)

Compare link: http://backpack.tf/profiles/76561198080179568?time=1443250800&compare=1443337200

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Sellers:

http://www.tf2outpost.com/trade/27108607 32 keys, 3 weeks

http://www.tf2outpost.com/trade/27150368 36 keys, 2 weeks

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Sale 2 sold quickly but there's another sale around there and unsolds not that far above, so I think this is reasonable. Feedback welcome.