Just a bit of advice. People want to see a few things,
1. Current lab setup and supply
By doing this it will show whether you value sterility and how big of an operation you are. If you appear to take that extra effort to do things in a way that is safe to us and you have plenty of product on hand, people will feel more comfortable ordering from you.
2. Security measures. Obviously if we're making transactions for illegal drugs we want to know we will be safe. I want to know you won't get arrested tomorrow and if you do I won't have to worry about issues with the police.
3. Courtesy and intelligence. After you seem to be safe and have a good setup, people will want to know that you're at least fairly intelligent. If you spell words wrong and structure your sentence like a foreign person, people won't feel comfortable ordering from you.
4. Prices and variety of product. So after you showed you are smart, courteous, safe, and sterile. Now people will actually care about how much your stuff costs.