Why not just use your affiliate link to get some commission. In addition of that, one could make a deal with the client of installation, support, updates, and what ever hand holding?
You could add a developer tab in "My Account" for those who purchase the modules for their clients, each module license should only be valid for one domain, therefore cheaper. When purchasing modules there should be an option to purchase as a developer.
Pablogy,
I don't really have any mechanism right now for reselling the modules, but I'll mark this down as something that I need to add to the site.
If you have any suggestions or ideas about the best way to do this, feel free to post them here. :)
Sincerely,
Leighton Whiting