Thank you all for your support. I have decided to carry both incense and
real essential oils.
Nia, I have this wonderful book in front of me: "The Complete Book of Essential Oils and Aromatherapy" by Valerie Ann Worwood. That's where the essential oil idea came from, and from what I've read so far, you are absolutely correct: what some are calling "essential oil" are nothing more than fragranced sunflower oil.
That isn't what I'm planning on doing, however. This book offers step by step instructions on making and using the "good stuff," and that is what I'll be selling, soon.
As for the incense: I have a supplier and I can get them at very good prices. The incense is all hand-made, high-quality and charcoal based. I am going to have sticks, cones and granular.