Requested by Fish

Sale 1:

Sold for ~11 keys in items

No outpost

Seller: http://backpack.tf/profiles/76561198242151638#!/compare/1490918400/1491091200

Buyer: http://backpack.tf/profiles/76561198071566056#!/compare/1491004800/1491091200

X = 11

Sale 2:

Quicksold for 10 keys + 6 ref

http://www.tf2outpost.com/trade/28870604 - B/O of ~10.4

Seller: http://backpack.tf/profiles/76561198072491439#!/compare/1491782400/1491868800

Buyer: http://backpack.tf/profiles/76561198126560462#!/compare/1491782400/1491868800

X = 10

Sale 3:

Quicksold for 10 keys

No outpost

Seller: http://backpack.tf/profiles/76561198060448233#!/compare/1490486400/1490659200

Buyer: http://backpack.tf/profiles/76561198094765856#!/compare/1490486400/1490659200

X = 10

Sale 4:

Sold for 8 keys + <1.5 keys in items

No outpost

Seller: http://backpack.tf/profiles/76561198125021096#!/compare/1491004800/1491091200

Buyer: http://backpack.tf/profiles/76561198242151638#!/compare/1490918400/1491091200

X = 9

Sale 5:

Sold for too many items

No outpost

Seller: http://backpack.tf/profiles/76561198071566056#!/compare/1491436800/1491523200

Buyer: http://backpack.tf/profiles/76561198089949624#!/compare/1491436800/1491523200

Best not to try to get an exact figure with this sale.

Sellers:

11 keys:

http://i.imgur.com/gRbYHeq.png - 19 days

http://backpack.tf/u/76561198045174236

http://i.imgur.com/7DyiKCe.png

http://backpack.tf/u/76561198118221611

Sales at:

9

10 (2x)

11

Sales at 10 quicksold. Excluding them.

Going with 11 flat.