Authentic oils should list the botanical name (e.g., Lavandula angustifolia for Lavender).
The most critical step is verifying that the oil is 100% pure and therapeutic grade. Check the product listing for the following details: buying essential oils on ebay
If a 15ml bottle of Rose or Sandalwood is priced at $5, it is almost certainly synthetic or heavily diluted, as these oils are extremely expensive to produce. Authentic oils should list the botanical name (e