More buying trades for wandering trader

To expand on the 1.20.2 upcoming trade rework:

I think that wandering traders should buy invisibility potions and leads, as they are used by them

I also think that there should be villagers (not necessarily the wandering trader) should buy saddles, horse armor, hearts of the sea, and music discs, as they are items that become worthless to players if they have too many of them.

I think that wandering traders should have a new trade category which only includes items exclusive to other biomes than the ones nearby when they spawn, since those items would be already accessible to the player. That way, wandering traders become useful for players who haven't yet explored much of their world. Wandering traders could also sell blaze rods/powder in peaceful mode worlds, as players currently don't have anyway of getting them in peaceful mode.