Requested

http://backpack.tf/item/4377225921

Sale 1) Sold for a Green Energy Prussian Pickelhaube + Burning Flames Magistrate's Mullet

http://backpack.tf/profiles/76561198067575136#!/compare/1477180800/1477267200

http://www.tf2outpost.com/trade/28556692 - Capped by the Buyout of 85 Keys

Sale 2) Quicksold for 70 Keys

http://backpack.tf/profiles/76561198087175689#!/compare/1473897600/1473984000

Sale 3) Quicksold for 78 Keys

http://backpack.tf/profiles/76561198063130455#!/compare/1473984000/1474070400 - Buyer's Backpack

Sale 4) Sold + ~26 Keys of Items + 12 Keys for a Duped Burning Flames Trophy Belt

http://backpack.tf/profiles/76561198063130455#!/compare/1474070400/1474243200

I can't find a Mini on the Trophy Belt, but the sale is likely around 85 Keys.