Unsure of full price but 14 doesn't seem a half bad. For the most part spells on unusuals (with the exception of postlifes) only add a small amount. The main exception where spells add a decent amount are for themed. For example, burning flames + rotten orange footprints. Now I do believe die job and vivid plasma go together, however I'm a little colour blind so might need a second opinion. As for full price i am unsure, it has been quite a while since I've delved into spell trading.