Item 1: https://backpack.tf/item/8162685190

Sales 1 & 2: Dumped to STN, picked up same day

https://backpack.tf/profiles/76561198150163450#!/compare/1751673600/1751760000

https://backpack.tf/profiles/76561198406138209#!/compare/1751673600/1751760000

Interestingly, none of the keys outgoing from Ctzn are to Warmvy, nor are Warmvy's incoming from Ctzn, but both are from an STN bot. Seems like it was dumped to STN and picked up by Ctzn same day, with about 69 keys 42.77 ref going to Warmvy for the dump, and Ctzn seemingly paying 76 keys, 39 ref.

Additional compare for the STN bot below:

https://backpack.tf/profiles/76561198311498888#!/compare/1751673600/1751760000

Taking the dump value as 69 keys, 42.77 ref from Warmvy's incoming, and Ctzn's pickup as the outgoing of 76 keys, 39 ref.

Sale 3: Bulk

https://backpack.tf/profiles/76561198261483133#!/compare/1752364800/1752451200

https://backpack.tf/profiles/76561198406138209#!/compare/1752364800/1752451200

Two in-date sales at 69 keys, 42.77 ref, and 76 keys, 39 ref.

Classifieds link: https://imgur.com/a/OqUoVXL

Taking the sale at 69 keys, 42.77 ref and rounding up to 70 keys, and the sale at 76 keys, 39 ref, and rounding up to 77 keys, and setting these values for the range.