The first link has a rejected highest offer of 1.66

The second link had no C/o when I found it, so I offered 1.11 to test the waters. Not sure if this trade is evidence enough, but I felt I should add it with the rest.

The third link is selling as a set, but the last hidden message has another offer of 1.66, but he's yet again selling as a set.

The fourth link is another trade with minimal interest, and the guy offering 1.66 is the same as the first link. I checked his trades, and he has a trade up that he's looking to buy a dirty head warmer for 1.33. I guess he's actively trying to get one.

The final link has a trade where the buyer actually will sell for 1.66-1.77 it looks like.

I had to look through about 10 pages of outpost trades to find enough dirty headwarmers to use as evidence. They aren't too common, and are wanted even though they are dirty. 1.66 seems like what the buyers are willing to pay, and I'm open to changing the price later, but I felt that it would be best to get a baseline price on the pricelist to start with.