https://marketplace.tf/items/tf2/30704;5;u58

$110 = 61 keys

$120 = 67 keys https://backpack.tf/item/7458099522

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https://backpack.tf/profiles/76561198125791160#!/compare/1574208000/1574294400

https://backpack.tf/profiles/76561198004322657#!/compare/1574121600/1574294400

Flammable Bubbles of Attraction Dueling Banjo + Burning Flames Big Country

The Big Country has no other usable sales

https://marketplace.tf/items/tf2/382;5;u13

A sale on the Big Country for $145 = 81 keys

But this one has been unsold at 65 ever since it was traded for

https://gyazo.com/6651740fcd5534f22975731d00db6003

Most likely this would've capped at a buyout if I could find one, but I could not

excluding

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https://backpack.tf/profiles/76561198004322657#!/compare/1574467200/1574812800

https://backpack.tf/profiles/76561198156255538#!/compare/1574726400/1574812800

Untraceable

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https://backpack.tf/profiles/76561198156255538#!/compare/1578528000/1578614400

https://backpack.tf/profiles/76561198136408462#!/compare/1578528000/1578614400

74 keys