Ey, Punk

https://backpack.tf/item/7660887979

Sale 1) Bulk sale for a Scorching Flames Killer Exclusive

https://backpack.tf/profiles/76561197994783413#!/compare/1564185600/1564272000

Sale 2) Sold for 80 Keys

https://backpack.tf/profiles/76561198218497692#!/compare/1565308800/1565395200

https://backpack.tf/item/7134859367

Sale 3) ?

https://backpack.tf/profiles/76561198106465170#!/compare/1557187200/1559088000

https://backpack.tf/profiles/76561198128213644#!/compare/1559865600/1559952000

Looks like 72 Keys

https://backpack.tf/item/7132753085

Sale 4) ?

https://backpack.tf/profiles/76561198081042493#!/compare/1558310400/1558396800

https://backpack.tf/profiles/76561198070892688#!/compare/1557964800/1558483200

Sale 5) ?

https://backpack.tf/profiles/76561198070892688#!/compare/1558483200/1558569600

https://backpack.tf/profiles/76561198016247559#!/compare/1558483200/1558656000

If this was a 1:1 for the Rocket Launcher, this sale is low.

Sale 6) Sold for $149.69 when Keys were ~$1.82 each

https://marketplace.tf/items/tf2/30993;5;u14

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

149.69 / 1.82 = 82.25, which rounds to 82 Keys

https://backpack.tf/item/6859476785

Sale 7) Bulk sale for a Purple Energy Hong Kong Cone

https://backpack.tf/profiles/76561198119429319#!/compare/1559001600/1559088000

Sale 8) Sold for a Purple Energy Rebel Rouser (46.5 Keys) + Vivid Plasma Attendant (29 Keys) + Aces High Das Ubersternmann + ~6 Keys of Items

https://backpack.tf/profiles/76561198120672630#!/compare/1559174400/1559260800

https://imgur.com/a/pzsZZpl - Capped by the Buyout of 90 Keys

Rebel Rouser Mini

https://backpack.tf/suggestion/5d50d0d76780725cdc3993a7 - 46.5 Keys

Attendant Mini

https://backpack.tf/suggestion/5d50d71f6780725e9f1a2044 - 29 Keys

https://backpack.tf/item/6851206302

Sale 9) Sold for 70 Keys + 3 Refined to a buy order

https://backpack.tf/profiles/76561198109986831#!/compare/1560470400/1560643200

Sale 10) Probably sold for 85 Keys

https://backpack.tf/profiles/76561198119634686#!/compare/1562025600/1562112000

https://backpack.tf/profiles/76561198098611646#!/compare/1561766400/1562371200

https://marketplace.tf/items/tf2/30993;5;u14 - Sold for $160 when Keys were ~$1.81 each

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

160 / 1.81 = 88.39, which rounds to 88 Keys