"Any hat can be priced based on a single sale if ALL these criteria are met:

- There are no other recent sales in the last 3 months

- The hat went to a collector or person who intends to keep the hat. A collector can be identified by looking at the person's trade history, item history of similar unusuals in the backpack OR if the owner has not resold the hat 1 month after the sale occurred."

Sale

http://www.tf2outpost.com/trade/27078863

http://backpack.tf/profiles/76561198049661710?time=1443337200 -> http://backpack.tf/profiles/76561198049661710?time=1443423600

Sold for Peace Honcho + S. Cardbeard (using its value at the time, was already 25-28 http://backpack.tf/vote/id/56071486ba8d885629c20b1e ), seller added 2 keys.

x + 2 = (30 + 26.5)*0.9 -> x = 49 keys flat price

Mini on the Peace Honcho ~ 30 keys:

http://backpack.tf/profiles/76561198079869886?time=1442214000 -> http://backpack.tf/profiles/76561198079869886?time=1442473200

Sold for Stormy Baker + pro FS Huntsman (sales around 10 keys on SCM, fits the lowest seller in classifieds) ~ 30 keys

http://backpack.tf/profiles/76561198079869886?time=1442646000 -> http://backpack.tf/profiles/76561198079869886?time=1442991600

Sold for duped PE Raincatcher which is also ~ 30

Any pertinent comments are welcome.