Next.

Sale 1: Sold for 11 keys

https://backpack.tf/profiles/76561198093603955#!/compare/1589068800/1589155200

https://backpack.tf/profiles/76561198980331319#!/compare/1589068800/1589155200

Sale 2: Unknown

https://backpack.tf/profiles/76561198984412892#!/compare/1589068800/1589155200

https://backpack.tf/profiles/76561198093603955#!/compare/1588896000/1589068800

Sale 3 & 4: Marketplace

https://marketplace.tf/items/tf2/30977;5;u6

https://backpack.tf/item/7021763524 (Sale 4?)

11.85 on March 17, 2020 (11.85/1.69 = 7.011 rounding to 7 keys)

19.99 on April 7, 2020 (19.99/1.69 = 11.82 rounding to 12 keys)

Sale 5: Unknown

https://backpack.tf/profiles/76561198137838908#!/compare/1590019200/1590278400

https://backpack.tf/profiles/76561198269484722#!/compare/1589932800/1590019200

Sale 6: Bulk for Purple Energy Glengarry Bonnet

https://backpack.tf/profiles/76561198070910160#!/compare/1586131200/1586217600

https://backpack.tf/profiles/76561198850274253#!/compare/1586131200/1586217600

Classifieds:

https://gyazo.com/9366a716b0e34aaa67653d18c2a4e6a5

Sales are at 7, 11, and 12. Buyers are at 9+. Excluding 7. Taking a range of 11-12 keys here.