Sale 1:

https://backpack.tf/profiles/76561198306692346#!/compare/1582761600/1582848000

https://backpack.tf/profiles/76561198851078363#!/compare/1582675200/1582761600

QS

sale 2:

https://backpack.tf/profiles/76561198851078363#!/compare/1582761600/1582848000

https://backpack.tf/profiles/76561198883896367#!/compare/1582848000/1582848000

https://backpack.tf/profiles/76561198851078363#!/compare/1582761600/1582848000

tradeback

sale 3:

https://backpack.tf/profiles/76561198851078363#!/compare/1582761600/1582848000

https://backpack.tf/profiles/76561198111464142#!/compare/1582761600/1582848000

Sold for OF Warming(8.75) + negligible sweets

Total is ~9 keys

https://bot.tf/stats/listings/MGZ0KJ3Q

B/O of ~9 keys

sale 4:

https://backpack.tf/profiles/76561198111464142#!/compare/1582848000/1583020800

https://backpack.tf/profiles/76561198113194487#!/compare/1582934400/1583020800

Untrace

sale 5:

https://backpack.tf/profiles/76561198113194487#!/compare/1583366400/1583452800

https://backpack.tf/profiles/76561198069664297#!/compare/1583107200/1583452800

untrace

sale 6:

https://backpack.tf/profiles/76561198069664297#!/compare/1583539200/1583625600

https://backpack.tf/profiles/76561198200420351#!/compare/1583539200/1583625600

Sold with ~1 key in sweets for Bubbling Marauder + negligible sweets

use there

https://bot.tf/stats/listings/Y35QKZ01

B/O of 8.5 keys

Sale 7:

https://backpack.tf/profiles/76561198200420351#!/compare/1583539200/1583625600

https://backpack.tf/profiles/76561198394457682#!/compare/1583539200/1583625600

Sold with negligible sweets for ~7.5 keys

Sale 8:

https://backpack.tf/profiles/76561198394457682#!/compare/1585094400/1585180800

https://backpack.tf/profiles/76561198187448465#!/compare/1585094400/1585180800

Sold for keys, can trace 5

Sale 9:

https://backpack.tf/profiles/76561198187448465#!/compare/1585094400/1585180800

https://backpack.tf/profiles/76561198339255153#!/compare/1585094400/1585180800

Sold for Aces Skid Lid + 2 keys

Lid Mini:

https://backpack.tf/suggestion/5ebf1a7c3fc7145a0e495843

Suggestion for 8.25 keys

Total is ~10 keys

https://bot.tf/stats/listings/YD11VPWV

B/O of 10 keys

sale 10:

https://backpack.tf/profiles/76561198339255153#!/compare/1585180800/1585440000

https://backpack.tf/profiles/76561198054270952#!/compare/1585094400/1585180800

Sold with 7 keys for Aussie GL(14)

Bulk

sale 11:

https://backpack.tf/profiles/76561198054270952#!/compare/1589241600/1589328000

https://backpack.tf/profiles/76561198085142983#!/compare/1589328000/1589414400

Sold for 10 keys

sale 12:

https://backpack.tf/profiles/76561198006544512#!/compare/1581897600/1581984000

https://backpack.tf/profiles/76561198096245286#!/compare/1580428800/1587427200

Untrace

sale 13:

https://backpack.tf/profiles/76561198096245286#!/compare/1580428800/1587427200

https://backpack.tf/profiles/76561198054002248#!/compare/1588636800/1588723200

untrace

sale 14:

https://backpack.tf/profiles/76561198841279602#!/compare/1582761600/1582848000

https://backpack.tf/profiles/76561198086178920#!/compare/1582848000/1583107200

Sold for ~7.5 keys

sale 15:

https://backpack.tf/profiles/76561198086178920#!/compare/1582848000/1583107200

https://backpack.tf/profiles/76561198066589108#!/compare/1582848000/1584230400

Untrace

sale 16:

https://marketplace.tf/items/tf2/259;5;u30

$14.99 / $1.75 = 8.57 keys

Total sales @:

7.5, 7.5, 8.5, 9, 10, 10 keys

buyers up to ~8 keys,

taking 8.5 - 10 keys