I'm creating my first DoD mod with a focus around crafting and inventory management. I'd really like to be able to make one of the skills let you sell an item as if you were in a store. I've been looking around and I can't see anything on here or in the game files that allow you to trigger this, other than that stores are designated a shop in their room properties. Is it possible to set this up as a spell?
I don't think so. There aren't any triggers for that, and no hooks you can use, so the chances of you making such a mod are very slim, especially with it being your first mod.