Thanks Giang.

Sale 1:

http://www.tf2outpost.com/trade/23616680

sold for 10.2 pure

Seller after: http://backpack.tf/profiles/76561198037461204?time=1415520000

Went in a couple hours, it seems. Possible quicksale.

Sale 2:

http://www.tf2outpost.com/trade/23793523

sold for 10 buds+ 7 keys + 1 bills

buyer after: http://backpack.tf/profiles/76561198118800021?time=1416643200

buyer before: http://backpack.tf/profiles/76561198118800021?time=1416556800

As you can see, he had a duped hearts TC which he sold for 8 buds and a spellbound flamenco to this guy:

http://backpack.tf/profiles/76561198051261360?time=1416556800

Price: 10 + 0.8 = 10.8

Sale 3:

http://www.tf2outpost.com/trade/24006358

sold for secret fez + 2 buds?

seller before: http://backpack.tf/profiles/76561198004379527?time=1417939200

seller after: http://backpack.tf/profiles/76561198004379527?time=1418284800

Price: 11*0.9 +2 = 11.9

Sale 4:

No link available - sold within a day

Sold for c9 kiss king (12.8 from mini)

buyer after: http://backpack.tf/profiles/76561198004379527?time=1417852800

buyer before: http://backpack.tf/profiles/76561198004379527?time=1417766400

Price: 0.9 * 12.8 = 11.52

mini for kiss king:

http://www.tf2outpost.com/trade/23584178

sold with bil's for miami KE+ duped pe lucha

buyer after http://backpack.tf/profiles/76561198046282627?time=1415347200

buyer before http://backpack.tf/profiles/76561198046282627?time=1415174400 (page 34)

Price: 0.9(8.5 + 5.7 ) = 12.78 ~ 12.8

mini for duped lucha:

http://backpack.tf/profiles/76561198125791160 - selling for 5.6 buds

http://www.tf2outpost.com/trade/24122474 - 80 keys ~ 6 buds

Rounding off 10.8 -11.9 to 11-12.