If you want anything other than flat fabric it's a lot more complicated than a clean export from MD. Dforce hates any kind of internal mesh collision, and setting up clothes in DAZ without their geometry intersecting if you have any kind of layering is awful.
I've done a fair bit of clothing for my own amusement to a fully rigged (read: can assume all base DAZ poses without pokethrough AND is dforce compliant) and it's not a fun day or three.
Well, yes. Even if you paid for the resources, even if they allow you to sell it without editing, no one would buy it anyway. I just meant, once you export out the piece of clothing, there's no way to tell how it was built (using pieces of the patterns, etc).