Some of the 60 key sales from last suggestion are in date

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https://backpack.tf/profiles/76561198079474904#!/compare/1597190400/1597276800

https://backpack.tf/profiles/76561198123441069#!/compare/1597104000/1597276800

Untraceable, looks like it may have sold for 60+ keys (looking at 2nd compare) then the keys obtained + more keys were spent on the death at dusk pencil (looking at 1st compare)

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https://backpack.tf/item/3244801813

went through scammer, then presumably was bought from unknown site, then sold on marketplace

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https://backpack.tf/item/3244801813

https://backpack.tf/item/2099967516

https://marketplace.tf/items/tf2/605;5;u58

$170 / $1.99 = 85.43 keys - 85 key buyout, was mine https://bot.tf/stats/listings/4KVOG7X1

$150 / $1.84 = 81.52 keys - no relevant buyout found

$160 / $1.79 = 89.39 keys - no relevant buyout found

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https://bot.tf/stats/listings/MQ021ZNQ

https://bot.tf/stats/listings/4EPRNNOE

https://bot.tf/stats/listings/4J9XQ2LX

some lower buyouts that didnt last very long

also i offered all of them 50 keys and got declined jajaja

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i round for 60-90?

https://backpack.tf/profiles/76561198123441069#!/compare/1598227200/1598313600

https://backpack.tf/profiles/76561198058323007#!/compare/1598140800/1598227200

66 keys looks like bought and then put on marketplace right away

https://gyazo.com/cc80b75285d5092f19857070e8f08cf8

https://gyazo.com/6f04684fbe6de243ddf7a965bbbaae44

the current "seller" for 66 is the one that sold, and the $179.99 listing is that same 66 key seller history