http://www.tf2outpost.com/trade/7540416

3 weeks ago

B/O: 31 keys

Best offer: 20 key unusual (outdated price however)

http://www.tf2outpost.com/trade/8084289

2 days old

No B/O

Only offer (rejected): assortment of items, very low offer from looking at their backpack

http://bazaar.tf/trade/116837

2 days ago, same guy as above

No B/O

2 offers around 14 key mark with items

http://www.tf2outpost.com/trade/8056284

3 days old

B/O: 20 keys

Only offer: 15 keys

http://bazaar.tf/trade/94480

3 weeks old

No B/O

No offers

http://bazaar.tf/trade/83916

1 month ago

No B/O

No offers

http://bazaar.tf/trade/61905

2 months ago

B/O: 17 keys

Offer: random offer, however he sold it (next link)

http://www.tf2outpost.com/trade/6077909

2 months ago as well

Sold for 6 keys + 16 craftable hats = 14 keys (at the time when you could buy 2 craft hats for 1 key)

Just updating the price, and again, still one of the least liked hats and effects in the game.