I second Neal's Yard. That's what I use, and have done for 5 years now! =) Amazing products and so versatile!! My clients and customers love them, as well as me.
You can become an independent consultant for Neal's Yard Remedies (NYR) and get 25% off all the products, as well as enabling you to sell to clients/customers, host events and pamper parties etc. I love the fact it benefits both business's, as you may meet people through the NYR that then become clients for treatments, and vice versa.
I'm happy to tell you more if you'd like, especially as there is an offer on becoming a consultant at the moment! =)
If not, then good luck with your new venture and I'm sure whatever you choose will work well for you.