Re-suggestion, all info consolidated.

Sale 1:

https://marketplace.tf/items/246;5;u83

Sold for 55 USD, keys at 1.97, total is ~28 keys

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Sale 2:

https://backpack.tf/profiles/76561198195731583#!/compare/1520985600/1521158400

https://backpack.tf/profiles/76561198292796500#!/compare/1520812800/1521158400

Sold for Duped Cauldron Coupe + 72 Disco Fever(47.5)

Coupe sold instantly for 15 keys + 8.88 ref, taking that.

Fever Mini:

https://backpack.tf/profiles/76561198301644953#!/compare/1523750400/1523836800

Sold for 14 pure

Recent sale for one at ~25 keys on marketplace.tf

https://marketplace.tf/items/30762;5;u3004

https://marketplace.tf/items/5021;6/Mann%20Co.%20Supply%20Crate%20Key

https://backpack.tf/profiles/76561198305676157#!/compare/1524009600/1524096000

Sold for 15 pure (within a day)

Torb has a a sale at 19 keys:

https://backpack.tf/profiles/76561198160856661#!/compare/1521504000/1521590400

Considering 15 sold fast, taking 19 to 25, average of 22 keys.

Total is 37 keys.

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Other sales are untraceable/bulk/QS

Info from Hanni:

Got this Stare From Beyond Pugilist's Protector from scrap.tf for ~13 keys 5 ref

https://backpack.tf/item/3154791300

https://prnt.sc/j7nh18

Sold it on SCM for 50 euros and Screaming Tiger Taunt: Party Trick

https://prnt.sc/j7npka

https://prnt.sc/j7nqrc

Traded 72 Taunt: Disco Fever for Cool Killstreak Hazard Warning Minigun (Minimal Wear)

https://prnt.sc/j7nn83

Fomay's Part:

Resold here for much less:

https://backpack.tf/profiles/76561198105403049#!/compare/1524873600/1524960000

https://backpack.tf/profiles/76561198413709516#!/compare/1524787200/1524873600

with ~7 in adds for a pfetti lucha(28.5)

Spelled mancer mini:

https://backpack.tf/profiles/76561198030058573#!/compare/1522886400/1522972800 ~3

Total is 28.5 - 7 = 21.5 keys

I'd either leave this outdated or give this a range with the lucha sale and the 28 sale.\

Taking 22 - 28 keys.