Looking at this item

Sale #1

https://backpack.tf/profiles/76561198236773400#!/compare/1590105600/1590796800

Sold for Kill-a-Watt L'homme Burglerre = 8 keys

Mini for Kill-a-Watt L'homme Burglerre

bp listings: https://prnt.sc/t7ova3

Taking 8 keys

Sale #2

https://backpack.tf/profiles/76561198236773400#!/compare/1592438400/1592870400

Sold - Shred Alert(1.05 keys) - Schadenfreude(1.73 keys) - Rock, Paper, Scissors(0.74 keys) + Strange Professional Killstreak Rocket Launcher(15 keys) = 11 keys

Mini for Strange Professional Killstreak Rocket Launcher

bp listings: https://prnt.sc/t7orj9

mp listings: https://prnt.sc/t7osfk

Looks to me like 15 keys in close enough when rounding to the nearest key.

Sale #3

https://backpack.tf/profiles/76561198242646048#!/compare/1592697600/1592784000

https://prnt.sc/t7p6b8

Sold for 7 keys 40 ref = 7.5 keys

Sale #4

https://backpack.tf/profiles/76561198140151738#!/compare/1592784000/1592870400

https://prnt.sc/t7p9ha

Sold for 8 keys + 20 ref = 8.5 keys

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Looking at this item

Sale #5

https://backpack.tf/profiles/76561198354057663#!/compare/1587513600/1587600000

Looks like it was sold for 8 keys

Sale #6

https://backpack.tf/profiles/76561198354057663#!/compare/1587600000/1587772800

https://backpack.tf/profiles/76561198368162760#!/compare/1520899200/1587686400

untrace

BUNCH OF UNTRACEABLE SALES

Sale #7

https://backpack.tf/profiles/76561198146117217#!/compare/1588118400/1588550400

https://backpack.tf/profiles/76561198090987063#!/compare/1588118400/1588204800

bulk/untrace

Sale #8

https://backpack.tf/profiles/76561198136331207#!/compare/1587340800/1588809600

https://backpack.tf/profiles/76561198090987063#!/compare/1588723200/1588809600

bulk/untrace

Sale #9

https://backpack.tf/profiles/76561198136331207#!/compare/1588809600/1588896000

https://backpack.tf/profiles/76561198140076265#!/compare/1587513600/1588896000

bulk/untrace

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Marketplace sales

https://marketplace.tf/items/tf2/30978;5;u33

NO RECENT SALES - LAST SALE DEC 26

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Listings

bp listings (buyers at 8 keys): https://prnt.sc/t7pn82

bazaar quickseller (10 keys): https://prnt.sc/t7po9r

mp buyer for ~5 keys

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Going with 8.5-11 keys.

11 keys might be a bit much, but I'll keep it in the range.

If you disagree or have other evidence, please leave a comment 🙂