Item 1:

https://backpack.tf/item/3132916677

Sale 1:

https://backpack.tf/profiles/76561198055622215#!/compare/1760659200/1760745600

https://backpack.tf/profiles/76561198838788284#!/compare/1760745600/1760832000

Sold for a Purple Energy Fruit Shoot + Purple Confetti Wandering Wraith + Circling TF Logo Bare Necessities + Ancient Specter Gauzed Gaze + Death's Daggers Triboniophorus Gentlemannus + Dark Twilight Taunt: Rancho Relaxo + Dark Twilight Taunt: The Pooped Deck + Dark Twilight Taunt: Mannrobics + Dark Twilight Taunt: Shanty Shipmate

Unfortunately no other sales on the Wraith, Gauzed Gaze, Triboniophorus Gentlemannus, Dark Twilight Taunt: Rancho Relaxo which make a up a good chunk of the sale :(

Sale 2:

https://backpack.tf/profiles/76561198838788284#!/compare/1767312000/1767398400

https://backpack.tf/profiles/76561198872222015#!/compare/1767312000/1767484800

Bulk for a Green Black Hole Exquisite Rack, better used there

Sale 3:

https://backpack.tf/profiles/76561198872222015#!/compare/1768089600/1768176000

https://backpack.tf/profiles/76561198220098345#!/compare/1768089600/1768176000

Untrace

Item 2:

https://backpack.tf/item/3182860504

Sale 4:

https://backpack.tf/profiles/76561198083134207#!/compare/1768176000/1768262400

https://backpack.tf/profiles/76561198315558870#!/compare/1768176000/1768262400

https://imgur.com/a/LmwZE6u - Credits PestControl

https://imgur.com/a/zwfKqc4 - Confirmation that Harmburg is 2000

Sold with a Moltern Mallard Rack (1060) for a Pan (3675) + 125 keys

= 2,740 (Technically)

Even though the Mallard rack is in date 'technically' the sale was out of date (based on the existing suggestion) but even still, it would comfortably cap it at 2000 keys

Going with 2000

//

Sellers:

BPTF - https://imgur.com/a/MjKnYuk - 1 @ 2000

MPTF - https://marketplace.tf/items/tf2/30123;5;u81 - None

STN - https://stntrading.eu/item/tf2/Unusual+Bonzo+the+All-Gnawing+Harmburg - None

SCM - https://steamcommunity.com/market/listings/440/Unusual%20Harmburg?filter=Bonzo - None

Sale(s):

2000

Last suggestions sale occurred just over 3 months ago so I am excluding it from the range. Going with 2000 keys flat