Sale 1:

https://backpack.tf/profiles/76561198850274253#!/compare/1581033600/1581120000

https://backpack.tf/profiles/76561198832267009#!/compare/1580169600/1582070400

Sold for 9 keys

sale 2:

https://backpack.tf/profiles/76561198021055079#!/compare/1585180800/1585267200

https://backpack.tf/profiles/76561198151387942#!/compare/1585267200/1585699200

Sold for keys

sale 3:

https://backpack.tf/profiles/76561198151387942#!/compare/1586217600/1587254400

https://backpack.tf/profiles/76561198161711912#!/compare/1586736000/1586822400

Sold with ~1.5 keys in sweets for ~11 keys in sweets

Total is 9.5 keys

https://bot.tf/stats/listings/4O97RVOW

B/O of 10 keys

Sale 4:

https://backpack.tf/profiles/76561198161711912#!/compare/1587859200/1587945600

https://backpack.tf/profiles/76561198841279602#!/compare/1587859200/1587945600

Sold for 7 keys

sale 5:

https://backpack.tf/profiles/76561198152385176#!/compare/1582848000/1586563200

https://backpack.tf/profiles/76561198337734785#!/compare/1586476800/1586563200

QS

sale 6:

https://backpack.tf/profiles/76561198337734785#!/compare/1587340800/1587427200

https://backpack.tf/profiles/76561198051905381#!/compare/1523577600/1587686400

Untrace

sale 7:

https://backpack.tf/profiles/76561198394877897#!/compare/1580256000/1580342400

https://backpack.tf/profiles/76561198971438628#!/compare/1579737600/1580515200

Sold for 7 keys

sale 8:

https://backpack.tf/profiles/76561198971438628#!/compare/1581120000/1581292800

https://backpack.tf/profiles/76561198072942714#!/compare/1580256000/1581120000

sold for DBD Broadband

use there

sale 9:

https://marketplace.tf/items/tf2/30019;5;u62

$17.2 / $1.69 = 10.18 keys

https://backpack.tf/item/2206142421

Total sales @:

7, 7, 9, 9.5, 10 keys

buyers up to ~7 keys,

sellers at ~9.5 keys,

taking 9 - 10 keys, conserving around all unsolds.