Originally posted by Certified Magic Man:

i do genuinely wish we had the OPTION to buy them, even if for a ridiculous amount of money or even a rarer material, sometimes there are just so many of them its better to just loot and run xD

This! Haldor loves his gold surely we could buy the upgraded mats off the Dverger - only the seal fragments wouldn't make sense for them to sell given the lore.