Time to finish up.

SALE 1

Bulk for burning antarctic eyewear

https://backpack.tf/profiles/76561198214461775#!/compare/1568764800/1568851200

https://backpack.tf/profiles/76561198077969288#!/compare/1568764800/1568851200

SALE 2, 3, 4, 5, 6, 7, 8 & 9

Sold for 23.75 on June 26 (23.75/1.83 = 12.97 rounding to 13 keys)

Sold for 29.99 on July 5 (29.99/1.85 = 16.21 rounding to 16 keys)

Sold for 29.69 on July 10 (29.69/1.84 = 16.13 rounding to 16 keys)

Sold for 29.95 on August 3 (29.95/1.82 = 16.45 rounding to 16 keys)

Sold for 25 on August 16 (25/1.83 = 13.66 rounding to 14 keys)

Sold for 23 on August 20 (23/1.84 = 12.5 rounding to 13 keys)

Sold for 14 on August 22 (14/1.83 = 7.65 rounding to 7.5 keys)

Sold for 19 on August 30 (19/1.82 = 10.43 rounding to 10 keys)

https://marketplace.tf/items/tf2/30767;5;u19

History of SALE 4: https://backpack.tf/item/7605781934

History of SALE 6: https://backpack.tf/item/7813679976

SALE 10

Sold for 15 keys

https://backpack.tf/profiles/76561198170190173#!/compare/1567814400/1567900800

https://backpack.tf/profiles/76561197994697258#!/compare/1567814400/1567900800

SALE 11

Unknown

https://backpack.tf/profiles/76561198342161127#!/compare/1568332800/1568419200

https://backpack.tf/profiles/76561197990261964#!/compare/1568419200/1568592000

SALE 12

Unknown

https://backpack.tf/profiles/76561198358280114#!/compare/1566432000/1568937600

https://backpack.tf/profiles/76561198342161127#!/compare/1566345600/1566432000

SALE 13

Sold for 11 keys + 13 refined

https://backpack.tf/profiles/76561198862571271#!/compare/1563494400/1563580800

https://backpack.tf/profiles/76561198273331466#!/compare/1563494400/1563580800

Rounds to 11 keys

SALE 14

Sold for 9 keys

https://backpack.tf/profiles/76561198195922917#!/compare/1568505600/1568764800

https://backpack.tf/profiles/76561198344975483#!/compare/1568678400/1568764800

The seller sold this for 9, after buying it for 11, see SALE 15. Excluding.

SALE 15

Sold for 11 keys

https://backpack.tf/profiles/76561198445049721#!/compare/1566432000/1566518400

https://backpack.tf/profiles/76561198195922917#!/compare/1566345600/1566518400

Dumped sale after, see SALE 14. Excluding.

SALE 16

Sold for 10 keys + 4.44 refined

https://backpack.tf/profiles/76561198063372917#!/compare/1561334400/1561420800

https://backpack.tf/profiles/76561198445049721#!/compare/1561075200/1561420800

Rounds to 10 keys

SALE 17

Unknown

https://backpack.tf/profiles/76561198185059557#!/compare/1564790400/1564876800

https://backpack.tf/profiles/76561198169939863#!/compare/1564790400/1564876800

SALE 18

Sold for 11 keys

https://backpack.tf/profiles/76561198131272664#!/compare/1564704000/1564790400

https://backpack.tf/profiles/76561198185059557#!/compare/1564617600/1564790400

SALE 19

Sold for atleast 3 keys + 3 refined

https://backpack.tf/profiles/76561197977418982#!/compare/1563408000/1563580800

https://backpack.tf/profiles/76561198131272664#!/compare/1563235200/1563580800

I know something else was added with those, but not sure what.

SALE 20

Sold for 12 keys + 33.88 refined + taunt: rancho relaxo

https://backpack.tf/profiles/76561198307532189#!/compare/1562976000/1563580800

https://backpack.tf/profiles/76561197977418982#!/compare/1563235200/1563408000

12 + 0.77 + 0.74 = 13.51 rounding to 14 keys

CLASSIFIEDS

https://gyazo.com/2a8b6ca33f8f15d65552471bc47c11a3

Sales at 10, 11, 11, 11, 14, and 15. Marketplace sales at 7.5, 10, 13, 13, 14, 16, 16, and 16.

Taking 10-16 keys.