http://www.tf2outpost.com/trade/22737796 - Sold for 10 buds.

This might have been a quicksale, as the seller lost all patience and sold it within a day, but...

http://www.tf2outpost.com/trade/22707032 - B/O of 11 buds, selling for 1 week.

http://www.tf2outpost.com/trade/22772172 - "Quickselling" for 12 buds. 4 days now.

http://www.tf2outpost.com/trade/22156511 - The first trader's hat also supposedly got offered $400, which is around 12.5 buds when converted from PayPal (though that was a while ago), and other competitive offers.

Maybe this is low, but I think 10 buds is reasonable, as the other sellers have B/Os near that. And besides, it's a misc now, so it needs a more realistic price.