Meh.

Sale 1

Before: http://backpack.tf/profiles/76561198160291216?time=1430667304

After: http://backpack.tf/profiles/76561198160291216?time=1430809200

- Sold for 11 keys (Outlier)

Sale 2

Before: http://backpack.tf/profiles/76561198122802981?time=1429479766

After: http://backpack.tf/profiles/76561198122802981?time=1429599600

http://prntscr.com/73xsyw

- Sold for a Strange Festive Knife (10 keys) + Strange Professional Killstreak Eyelander (6 keys) + 1 key (17 keys) (No overpay)

Sale 3

http://www.tf2outpost.com/trade/25685409 - Sold for a Strange Gunslinger (18*0.9 = 16 keys)

Sale 4

http://www.tf2outpost.com/trade/25372796 - Sold with 4 keys for a Smoking Master's Yellow Belt (21*0.9 - 4 = 15 keys) but BO of 14 keys

Sale 5

Before: http://backpack.tf/profiles/76561198143696927?time=1430118000

After: http://backpack.tf/profiles/76561198143696927?time=1430242150

- Sold with 16 keys + sweets for a Green Energy Dead Cone (31 - 16 = 15 keys) (No overpay)

Feel free to counter / support my proofs