And then you've come full circle to the fact that there's no market for anything past +13 - there's effectively no market for +13 astera weapons either.
Think about how many +15 items have been sold historically and what kind of players ended up being the buyers - "just buy it" is a nice sentiment but it's completely out of reach for the vast majority of players when it comes to high enhance items. Much further out of reach than reforging items on their own.