Whatever you do with this new separate SkyBlock economy, idk; but I'm suggesting items that should be on the list. If you think I missed anything, feel free to add on.
Red stone
Iron
Gold
Saplings (all four types in current SkyBlock)
Water Bucket
Lava Bucket
Clay blocks (please not clay balls)
Obsidian
Efficiency 5
Protection 4
Unbreaking 3
Silk Touch 1
Fortune 3
Sponge
Diorite
Granite
Andesite
Lapis Blocks
Prismarine
Sandstone
Red sand
Flowers (dye)
Diamond (very expensive)
Leather or Iron Armour