TAKM
Terrarian
I think that there are a lot of things that would be nice to buy from NPCs that you can't.
Angler - new items
Apprentice bait - 20 silver
Journyman bait - 60 silver
Master bait - 1 gold
Dryad - New Items
Teleportation potion - 2 gold
Wormhole potion - 1 gold
Swiftness potion - 50 silver
Ironskin potion - 50 silver
(hardmode) greater health potion - 1 gold
Angler - new items
Apprentice bait - 20 silver
Journyman bait - 60 silver
Master bait - 1 gold
Dryad - New Items
Teleportation potion - 2 gold
Wormhole potion - 1 gold
Swiftness potion - 50 silver
Ironskin potion - 50 silver
(hardmode) greater health potion - 1 gold