A sticky-jumper's best friend.

Sale 1

http://www.tf2outpost.com/trade/22148935 - Sold for an Aces High Carouser's Capotain + 2 keys but had BO of 15 keys

Sale 2

http://www.tf2outpost.com/trade/22125982 - Sold for a Uncraft Summer Hat (12*0.9 = 11 keys)

Sale 3

http://www.tf2outpost.com/trade/21982165 - Sold for 6 keys + Strange Black Camera Beard (3 keys) + Black Cut Throat Concierge (1.4 keys) + White Non-Craftable Executioner (1 key) (6 + 5.4*0.9 = 11 keys)

Feel free to counter / support my proofs