0 as shown in bp.tf? Bullshit.

The only such hat in existence is now in a backpack that hasn't been active on OP. Only a single non-outdated sale.

http://www.tf2outpost.com/trade/22599188 ~ Sold for 2 buds, Bubbling Whoopee and 5 keys = 3.06 but I'd round to 3 buds as it looks better. 3.1 in unsightly. (According to NecroTed) (Prices were according to bud prices at that time which is 17 keys.)

Feel free to counter or support my proofs.