Very few sales traceable.

Sale 1:

http://www.tf2outpost.com/trade/24132348

backpack before: http://backpack.tf/profiles/76561198056633382?time=1418457600

backpack after: http://backpack.tf/profiles/76561198056633382?time=1418544000

1:1 with a cosa nostra cap it's a secret to everybody (10.8)

10.8 x 0.9 = 9.72 rounded down to

9.7 buds

Sale 2:

http://www.tf2outpost.com/trade/23961411

backpack before: http://backpack.tf/profiles/76561198043236817?time=1416816000

backpack after: http://backpack.tf/profiles/76561198043236817?time=1414306800

1:1 with a purple energy cold killer (10.75)

11 x 0.9 = 9.9 rounded up to

10 buds

Mini on Cold Killer:

http://www.tf2outpost.com/trade/24353453 had an offer of 11 buds though seems to have changed

Sale:

backpack before:http://backpack.tf/profiles/76561198036128056?time=1416470400

backpack after: http://backpack.tf/profiles/76561198036128056?time=1416643200

1:1 for a it's a secret to everybody honcho's (11)

Sale:

http://www.tf2outpost.com/trade/24331233

Sold for a conjurer's cowl burning flames (11 buds though outdated)

Taking it as 11 especially due to the honcho's.