If you're taking your specialty training, or heck, if you are just a regular customer at your local dive center, they should be happy to process your Adventure and/or Advanced Diver certifications at their cost, which is less than $15 per cert. At least that is how we treat our divers - you can't expect to make money off of someone every time they visit you! If they've completed the prerequisites, and they are buying gear, or buying training, or buying dives, then pass the certs through at cost - you'll be rewarded many times over.