Re: What can I buy with each type of currency?

@MrGreenWithAGunUnlock legends, buy a recolour on occasion, and reroll daily challenges. In essence you can't really use them on anything, which is why I have like 1.5 million of them.

The materials (245) are used to craft skins, trackers, banner frames, etc..
The coins (1900) are used to purchase stuff in the store, like skins and packs.

The last one... have no idea, it's something new that arrived after I stopped caring.