Alright, so this hat is a bit tricky to research, because it has a low demand. It also has a low outpost supply.

There's people offering .33 on unpainted ones, but any higher, even with paint, seems impossible at the moment.

http://www.tf2outpost.com/trade/6692349

http://www.tf2outpost.com/trade/7181188 rec offers

http://www.tf2outpost.com/trade/7413756 speaks for itself

I'm not going to post a lot of the trades I found, since they were trying to sell for .44+, which isn't possible with a hat like the bonnet. Most of the other offers are unresponded to, since there's only a few pages of active trades that have been bumped recently.

I'm an owl.