Meh.

Sale 1

http://www.tf2outpost.com/trade/25830902 - Sold with 3 keys for a Stormy Storm Salty Dog (29*0.9 - 3 = 23 keys)

Sale 2

Before: http://backpack.tf/profiles/76561198070471278?time=1429686000

After: http://backpack.tf/profiles/76561198070471278?time=1429772400

- Sold for 4 keys in items + Vintage Professional Killstreak Lugermorph (9 keys) + Pink Bill (3 keys) + 11 keys + 1 bud (5.5 keys) (16.5 + 16*0.9 = 31 keys) (Outlier)

Sale 3

http://www.tf2outpost.com/trade/25963015 - Sold for a Dead Presidents A Rather Festive Tree (19*0.9 = 17 keys)

Sale 4

Before: http://backpack.tf/profiles/76561198147499241?time=1429079503

After: http://backpack.tf/profiles/76561198147499241?time=1429079503

- Sold for a Nuts n' Bolts Troublemaker's Tossle Cap (22 keys) (Nuts n' Bolts Troublemaker's Tossle Cap wasn't outdated atm)

Sale 5

http://www.tf2outpost.com/trade/25549785 - Sold for 20 keys

Sale 6

http://www.tf2outpost.com/trade/25560728 - Sold with 3 keys sweets for a Duped Max but had BO of 23 keys

Feel free to counter / support my proofs