There are a lot of very important items in these documents and you do not want to make a mistake here. This begs the question, "What is the most important clause to include in a purchase agreement or letter of intent?"
Why would you ever have to sign any type of agreement before you ever see the terms. When shopping for a car would you sign a letter stating that you will buy a car for ุꯠᇸ and hand them your money hoping that they give you a new BMW when they deliver to you a 1975 Pinto? No of course you would not.