Hellfire Metal Slug:

Sold for 88 keys + FaN Pro KS Fabricator (2 keys) + Brass Beast Pro KS Fabricator (2 keys);

Seller - https://backpack.tf/profiles/76561198306288794#!/compare/1588809600/1588896000

Buyer - https://backpack.tf/profiles/76561198026360445#!/compare/1588896000/1589068800

Item History - https://backpack.tf/item/2032209059

FaN Pro KS Fab minis:

SCM sales consistent between 2-2.5 keys - https://steamcommunity.com/market/listings/440/Professional%20Killstreak%20Force-A-Nature%20Kit%20Fabricator

In-date marketplace sales consistent with this range as well - https://marketplace.tf/items/tf2/20003;6;kt-3;td-45;od-6526;oq-6

Brass Beast Pro KS Fab minis:

SCM sales consistently between 1.75-2 keys - https://steamcommunity.com/market/listings/440/Professional%20Killstreak%20Brass%20Beast%20Kit%20Fabricator

Marketplace sales are unusable as they vary or go to b/o mostly - https://marketplace.tf/items/tf2/20003;6;kt-3;td-312;od-6526;oq-6

Taking 92 flat.

Another listing for 200USD on marketplace has been up for a few days now, have been keeping track on this, and will resuggest should the sale go through.

As it stands with current key prices, the suggested value could end up with a range of 90-100 keys (depending on that sale).