Business alway have risk, even you receive inquries from a famouse B2B website or a very famouse company, the main thing you can do is try to reduce the risk. If all the inquries is absolutely true and they want to do business sincerely with you, then everyone will do business in the world and no one do others, isn"t it.

And my opinion is before you sent your products to your costomer, you must know as more imformation of them, or you must ask them to pay you more money. Reduce the risk to smallest, at the same time, you must always keep honesty when you comunicate with your costomers, then they will trust you and would agree more in  your business.