Vendor is pointless when it comes to be getting the bound version of the items. All of them are basically the same stuff that drops every second run, what's the point in getting the bound version of it as well?
Last time we had items like Heartseekers or Lifethief Blades that were actually hard to loot from boss (using elixir) but there was bound version for slugs in the vendor.
Why can't same happen to other items that are not dropping from the boss so often this time either?
Mountain Teeth, Gloom Hunter, Eagle Talon for example... those should be for slugs as well. Not mentioning the Royal Tabards or Brown Heraldics...