9 months old price. Two sales in the last 7 weeks, once for 1.33 pure and once for 1.45 pure. Range=1.3-1.5

1.45 pure - http://www.tf2outpost.com/trade/9656156

1.33 pure - http://www.tf2outpost.com/trade/9153061 - http://backpack.tf/id/76561198010660680?time=1363417200

Reasons for including the 1.3 pure in the range (even though it's 7 weeks old)

(1) 9 months old price (7 weeks gives us one more data point)

(2) The one that just sold was the only one on the market for 7 weeks and only just got sold for 1.5 pure. This is probably it's maximal value.

Pill - if it was just based on the 7 weeks thing, I probably wouldn't have done it. But I think 1.5 is genuinely the maximum value of this hat.