The LOI as it is now used is a misunderstood application of poorly informed brokers and traders. A more proper application based on established custom and practice in International trade, going back even to the old medieval "Law Merchant" (Lex Mercantilis) is: Buyer requests a quotation _ in modern usage this is an RFQ/Request For Quotation _ NOT an LOI. Seller may then reply with a Quote. Buyer confirms receipt of quoted prices, and requests an Offer.
Next you will mention the date. The next stage is the body paragraphs. In the body paragraph you are supposed to state why do you intend to buy the business? What synergies can be created from takeover and how can you grow the business in future? What is the price range you are willing to pay for the business? Who are the people who intend to buy the business? These are some of the basics things you will be required to mention. letters of intent can be altered according to the user's requirements.