Seems like most people horde their large stones and large devils scales, and are never willing to trade them for lesser ingredients (mainly because they are the bottleneck in most crafting since almost all recipes require them). However, I have a limited number of extra large stones that I'd be willing to trade. Give me 3x large shrapnel or large arrowheads and I'll give you a large stone. Will also trade 3x of my large stones for 2x of your large scales. Either send them to me in the mail, and I'll mail you your stones, or contact Mystera in game.