Witch's Broomstick

https://backpack.tf/item/4255231047

Sale 1) Bulk sale for a Strange Sunbeams Killer Exclusive

https://backpack.tf/profiles/76561198258728302#!/compare/1558137600/1558310400

Sale 2) Sold for $112 when Keys were ~$1.81 each

https://marketplace.tf/items/tf2/30672;5;u3022

https://marketplace.tf/items/tf2/5021;6

https://gyazo.com/8ece417b6312ea0fa9c9cc8cc0eb6d4b - Thanks, Drago

112 / 1.81 = 61.87, which rounds to 62 Keys

https://backpack.tf/item/4314912237

Sale 3) Bulk sale for a Duped Harvest Moon Exquisite Rack

https://backpack.tf/profiles/76561198073823378#!/compare/1560124800/1560297600

https://backpack.tf/profiles/76561198056793885#!/compare/1560038400/1560297600

https://backpack.tf/suggestion/5d03e710d381721a3a350857

Sale 4) Bulk sale for a Morning Glory Coldfront Curbstompers

https://backpack.tf/profiles/76561198056793885#!/compare/1560816000/1561334400

https://backpack.tf/item/4298495121

Sale 5) Bulk sale for a Duped Vintage Max's Severed Head

https://backpack.tf/profiles/76561198087708756#!/compare/1560988800/1561075200

https://backpack.tf/profiles/76561197994697258#!/compare/1560988800/1561075200

https://backpack.tf/item/4258283167

Sale 6) ?

https://backpack.tf/profiles/76561198293832300#!/compare/1556928000/1557014400

https://marketplace.tf/items/tf2/30672;5;u3022 - Sold for $130 when Keys were ~$1.84 each twice

https://marketplace.tf/items/tf2/5021;6

130 / 1.84 = 70.65, which rounds to 71 Keys