Item 1:

https://backpack.tf/item/13255004021

Sale 1:

https://backpack.tf/profiles/76561197974125477#!/compare/1754697600/1755216000

https://backpack.tf/profiles/76561198416329506#!/compare/1755129600/1755388800

Sold for 6 keys and 30 ref

Rounding this to 6.5 keys

Item 2:

https://backpack.tf/item/607575758

Sale 2:

https://backpack.tf/profiles/76561198125791160#!/compare/1756771200/1756857600

https://backpack.tf/profiles/76561198251982584#!/compare/1756857600/1756944000

Sold for 7 keys pure (ID 16128431034)

Sale 3:

https://backpack.tf/profiles/76561198251982584#!/compare/1757116800/1757203200

https://backpack.tf/profiles/76561199017959799#!/compare/1757030400/1757203200

Sold with a Dead Man's Party Taunt: Flippin' Awesome for a Purple Confetti Towering Titanium Pillar of Hats. Better used for Pillar

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Sellers:

BPTF - https://imgur.com/a/tEYnRF1 - 1 @ 8 keys, 1 listed on MP as per below (Based on comment ~9.5 keys)

MPTF - https://marketplace.tf/items/tf2/167;5;u3114 - 2 @ $18.88

STN - https://stntrading.eu/item/tf2/Unusual+Solar+Scorched+Taunt%3A+The+High+Five%21 - None

SCM - https://steamcommunity.com/market/listings/440/Unusual%20Taunt%3A%20The%20High%20Five%21?filter=Solar+Scorched - https://imgur.com/a/K3NELlz - 1 @ $43.43AUD (~13 keys), 1 @ $47.66AUD (~14 keys), 1 @ $47.79AUD (~14 keys)

Sale(s):

6.5, 7

Going with 6.5 - 7 keys