I think I found..

Taking last 2 months.

Sale 1: Bulk for scorching ke

https://backpack.tf/profiles/76561198016339526#!/compare/1568592000/1568678400

https://backpack.tf/profiles/76561198128495187#!/compare/1568592000/1568678400

Sale 2: Sold for 32 keys

https://backpack.tf/profiles/76561198006544512#!/compare/1567123200/1567209600

https://backpack.tf/profiles/76561198061440669#!/compare/1567123200/1567209600

Sale 3: Unknown

https://backpack.tf/profiles/76561198061440669#!/compare/1567468800/1567555200

https://backpack.tf/profiles/76561198277435514#!/compare/1567296000/1567900800

Sale 4: Unknown

https://backpack.tf/profiles/76561198277435514#!/compare/1570665600/1571011200

https://backpack.tf/profiles/76561198071588645#!/compare/1570492800/1570838400

Sale 5: Unknown, likely a low sale involving keys

https://backpack.tf/profiles/76561198118580639#!/compare/1571356800/1571443200

https://backpack.tf/profiles/76561198337734785#!/compare/1571356800/1571443200

Sale 6: Bulk for time warp galvanized gibus

https://backpack.tf/profiles/76561198021055079#!/compare/1568160000/1568246400

https://backpack.tf/profiles/76561198129995083#!/compare/1568160000/1568246400

Sale 7: Sold for 31 keys?

https://backpack.tf/profiles/76561198080179568#!/compare/1567123200/1567209600

https://backpack.tf/profiles/76561198061440669#!/compare/1567123200/1567209600

Not sure about this, as the 31 don't match in histories. The buyout was 32, so it's likely it sold for 32.

https://bot.tf/stats/listings/M17X51JO

Buyout was 32 keys

Sale 8: Unknown

https://backpack.tf/profiles/76561198337734785#!/compare/1567123200/1567209600

https://backpack.tf/profiles/76561198061440669#!/compare/1567123200/1567209600

https://bot.tf/stats/listings/M17X51JO

Buyout was 32 keys

Sale 9: Sold for 32 keys

https://backpack.tf/profiles/76561198061440669#!/compare/1567123200/1567209600

https://backpack.tf/profiles/76561198847955284#!/compare/1567123200/1567209600

Duped sales:

Sale 1: Unknown

https://backpack.tf/profiles/76561198129552058#!/compare/1570579200/1570665600

https://backpack.tf/profiles/76561198163116031#!/compare/1570492800/1570665600

Sale 2: Bulk sale for keys

https://backpack.tf/profiles/76561198063481761#!/compare/1569801600/1570233600

https://backpack.tf/profiles/76561198129552058#!/compare/1570147200/1570233600

Sale 3: Sold for 58 on september 19

https://marketplace.tf/items/tf2/337;5;u30

https://backpack.tf/item/1529848500

58/1.83 = 31.69 rounding to 32 keys

Sale 4: Sold for atleast 5 keys

https://backpack.tf/profiles/76561198448089440#!/compare/1569369600/1569715200

https://backpack.tf/profiles/76561198337734785#!/compare/1569283200/1569369600

Classifieds:

https://gyazo.com/5cc140b43276ac305f203b4ded5259df

Conclusion:

Sales at 32 and 32. Duped sale at 32. Unconfirmed sale at 31.

Taking 32 keys.