Sales in-date from last suggestion:

https://marketplace.tf/items/tf2/54;5;u29

$172 / $1.98 = 86.87 keys - this one is duped, I bought it https://backpack.tf/item/1412749873

$210 / $1.94 = 108.25 keys - this one is clean, I bought it https://backpack.tf/item/581651624

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https://backpack.tf/profiles/76561198064658655#!/compare/1598400000/1598486400

https://backpack.tf/profiles/76561199071657104#!/compare/1598400000/1598486400

https://gyazo.com/db942743ee30f51c8cbca0c98a71d8bd

https://gyazo.com/b98fd404078046a27789c4b0158ad532

Sold the clean one for 140 keys (duped still on Marketplace)

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https://backpack.tf/profiles/76561198114402400#!/compare/1595635200/1596067200

https://backpack.tf/profiles/76561198030039729#!/compare/1585872000/1596844800

35 keys,

Strange Purple Energy Safe n Sound - has no minis, 36 key non-strange buyers https://gyazo.com/45483f909c092a6c850e2b1c052306d2

Miami Nights Crone's Dome - 65 key buyers https://gyazo.com/f6f66ae150efc24efdc15ac572d2d5ed

Will certainly cap at 150 key buyout https://bot.tf/stats/listings/4WXOEN0Z

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Rounding for 110-150