Item description:

01. Gold Rush

69 gold medals already. One more to go.

Link:
US: RDR2 Gold Rush(CUSA03041)
EU: RDR2 Gold Rush(CUSA08519)

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02. Best in the West

Go to the trapper and buy all remaining equipments.

Link:
US: RDR2 Best in the West(CUSA03041)
EU: RDR2 Best in the West(CUSA08519)

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03. Zoologist and Skin Deep

The last one you need to study and skin is Florida Panther. The location has been marked on the map.
If it isn't a Florida Panther, but a normal panther or just a stranger near by, go back to the campsite and sleep.
Florida Panther might appear during night time at a high rate. It doesn't matter if you die. The animal will be the same one when the game is reloaded.

A little tip for those who find difficulty studying this animal:
Block your scent before you set out. When you nearly approach the mark, get off your horse, press L3 to crouch and move slowly.
Use Eagle Eye to find where it is and keep a distance. Study it with the telescope, then kill it using Dead Eye and skin.

Thanks to Purgatory's tip:
You can also set bait for the panther, that way you can safely study it without worrying about it attacking you, and then kill it.
it'll spawn as "Big Cat" guys

Link:
US: RDR2 Zoologist and Skin Deep(CUSA03041)
EU: RDR2 Zoologist and Skin Deep(CUSA08519)

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04. Best in the West, Zoologist and Skin Deep in One Save

The save might pop Zoologist and Skin Deep trophies as soon as you load the game, if not, enter the "Progress -> Compendium -> Animals" page should do.
These two trophies will pop at the same time, so if you want a proper trophy order and timestamp, don't use this.
For Best in the West trophy, go to the trapper and buy all remaining equipments.

Link:
US: RDR2 Best in the West, Zoologist and Skin Deep(CUSA03041)
EU: RDR2 Best in the West, Zoologist and Skin Deep(CUSA08519)