You need 2sales.

Also we can't access your inventory history since it's private.

http://forums.backpack.tf/index.php?/topic/3306-new-rule-regarding-unusual-suggestions-two-sales-rule/

Please take a closer look at the site rules before making your next suggestion; http://backpack.tf/vote?showrules=1

All unpriced unusuals require at least two sales to price; this is to avoid pricing off outliers or quicksells.

We can't see your inventory history; you need to take screenshots of it showing the trade and the effects on the hats