In short, I downloaded the Imperial Age Magick supplement, and I love everything I've read about it. There's just one thing I'm not certain of: I'm thinking about running a high-magic campaign with the First Practice and a mix of the Third and First Price, and I'm thinking about having spells up for sale on the open market. My question is this: how should I guage the purchase DCs for spells? I already plan to have a +1 Liscens to most spells, a military restriction to most Evocation spells, and a Restricted liscense to Necromancy spells, but other than that, I don't know how to faily set the DCs. Also, should I handle wizards researching and creating their own spells?