Thanks to FallenCrown for the info!

Sale 1:

https://backpack.tf/profiles/76561198093233903#!/compare/1528588800/1528675200

https://backpack.tf/profiles/76561198253606754#!/compare/1528675200/1528761600

untrace/bulk

Sale 2:

https://backpack.tf/profiles/76561198253606754#!/compare/1528761600/1528848000

https://backpack.tf/profiles/76561198048851745#!/compare/1528761600/1528848000

Sold for 18 keys, QS

Sale 3:

https://backpack.tf/profiles/76561198048851745#!/compare/1531353600/1531440000

https://backpack.tf/profiles/76561198040186479#!/compare/1531353600/1531440000

Sold for 21 keys

https://imgur.com/a/3umTzjf (3rd pic)

Sale 4:

https://backpack.tf/profiles/76561198040186479#!/compare/1531958400/1532044800

https://backpack.tf/profiles/76561198135463624#!/compare/1531958400/1532044800

Sold with Strange Macaw RL(10) for DP Peak + ~4 keys in sweets

https://imgur.com/a/3umTzjf

Peak Mini:

https://backpack.tf/suggestion/5b5fc27944325a4ae6537063

Suggestion for 40 keys

Total is 34 keys

According to comment on previous suggestion, there was a B/O of 25.

Capping there.

Sale 5:

https://backpack.tf/profiles/76561198135463624#!/compare/1532044800/1532304000

https://backpack.tf/profiles/76561198063640894#!/compare/1532217600/1532304000

Sold for FoD Schadenfreude.

https://backpack.tf/suggestion/5b60c454cf6c7532b54c891e

Suggestion for 27.5 keys

Lets take a range of 21 - 28 keys