L. A simple but sometimes overlooked item. Include language that allows the LOI to be signed in counter_parts. Again, this is a small item but it can save you days in the process. A Letter of Intent is a terrific tool for helping to get your transaction off to good start and moving it toward closing more efficiently. While the information above certainly isn't exhaustive, it provides a great platform. As stated above, always consult the proper professional before acting.
* The seller can also reply with a pro forma invoice. In fact a pro forma invoice can serve as quote and offer, becoming a more or less binding purchase order upon buyer acceptance and signing. Pro formas are used more in smaller FCL trades, and not in larger bulk trades.