Item 1:

https://backpack.tf/item/221559279

Bought on MPTF, see below

Item 2:

https://backpack.tf/item/1851011888

Bought on MPTF see below

Item 3:

https://backpack.tf/item/347886797

Listed on MPTF

Sale 1 & 2:

https://marketplace.tf/items/tf2/314;5;u15

Sold for $27.99 on the 24th of July and 27th of Aug

Keys were

https://marketplace.tf/items/tf2/5021;6

24th - $1.94 (27.99/1.94) = 14.4 (Rounding to 14 keys)

27th - $1.81 (27.99/1.81) = 15.4 (Rounding to 15 keys)

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Sellers:

BPTF - https://imgur.com/a/y3xoqIC - Listed on MPTF but based on sale price key value of ~14.7 keys

MPTF - https://marketplace.tf/items/tf2/314;5;u15 - 2 @ 27.99

STN - https://stntrading.eu/item/tf2/Unusual+Searing+Plasma+Larrikin+Robin - None

SCM - https://steamcommunity.com/market/listings/440/Unusual%20Larrikin%20Robin?filter=Searing+Plasma - https://imgur.com/a/RbKwWKA - 1 @ $71.53 AUD (~20 keys), 1 @ $88.15AUD (~ 25 keys)

Sale(s):

14, 15

Going with 14 - 15 keys flat