Since this is under 10 keys, 8.72 would round to 8.5 keys, not 9.

Sale 2 is actually 2 different trades between the two parties, the Trilby sold for the pullover and scatter, where the taunt + bucks sold for 7 keys 21.44 ref

https://backpack.tf/profiles/76561198261915734#!/compare/1591574400/1591660800

https://backpack.tf/profiles/76561198045551697#!/compare/1591488000/1591660800

Excluding the bucks it would be below current buyers, and I bet the bucks is worth a decent bit.

https://marketplace.tf/items/tf2/30920;5;u3035

$9 / $1.99 = 4.52 keys

https://imgur.com/a/hr9NgMM - buyers above 9 now. Hmm. Honestly the buyer seem quite high here, https://bot.tf/stats/listings/4R0E8GO9 - have only been there for 2 days now.

I would leave this up for at least a bit longer to see if more sales occur/what happens to the buyers that appeared. If the buyers stay where they are, this might be better left unpriced, especially given that the 8.5 sale was already almost outdated when you made this suggestion.