Hoarders

http://backpack.tf/item/1017916127

Sale 1) Sold for a Death by Disco Hellmet (73 Keys) + Infernal Smoke Boston Breakdance (26 Keys)

http://backpack.tf/profiles/76561198233331152#!/compare/1491264000/1491350400 - Buyer's Backpack

73 + 26 = 99, which I'll round to 100 Keys

Breakdance Mini

http://backpack.tf/suggestion/59497fe4cf6c75236f6fbd68 - 26 Keys

Sale 3) Sold + ~11 Keys of Items for a Haunted Ghosts Professional's Ushanks (120 Keys)

http://backpack.tf/profiles/76561198233331152#!/compare/1493164800/1493251200

120 - 11 = 109, which I'll round to 110 Keys

Scattergun Mini

Using the $28 Sale

http://steamcommunity.com/market/listings/440/Strange%20Specialized%20Killstreak%20Shot%20to%20Hell%20Scattergun%20%28Factory%20New%29

http://imgur.com/a/tiNZy - Seller at 90 Keys