Sale 1:

https://backpack.tf/profiles/76561198067402592#!/compare/1571443200/1571616000

https://backpack.tf/profiles/76561198108345568#!/compare/1571529600/1571616000

Sold for OF Helm(11) + 4 keys

Total is 15 keys

https://bot.tf/stats/listings/4RGO96W5

B/O of 20 keys

sale 2:

https://backpack.tf/profiles/76561198322087870#!/compare/1568505600/1569283200

https://backpack.tf/profiles/76561198177569915#!/compare/1569196800/1569283200

Sold for 20 keys

Sale 3:

https://backpack.tf/profiles/76561198177569915#!/compare/1570060800/1570492800

https://backpack.tf/profiles/76561198107192699#!/compare/1570406400/1570492800

Sold for P Fetti Bandana

use there

Sale 4:

https://backpack.tf/profiles/76561198107192699#!/compare/1572393600/1572480000

https://backpack.tf/profiles/76561198066174226#!/compare/1572307200/1572912000

Sold for Aces Noble + DBD Works

Novle Mini:

https://backpack.tf/suggestion/5dd708ebd3817209df43611c

Suggestion for 14 keys

Works Mini:

https://backpack.tf/suggestion/5dd72956d381722c2a1937e6

Suggestion for 11 keys

Total is 25 keys

https://bot.tf/stats/listings/4RG500Q5

B/O of 30 keys

Total sales @:

15, 20, 25 keys

taking the wide range of 15 - 25 keys,

nothing that stands out to me to exclude any sale.