But intentions are not binding contractual conditions. Nor need they lead up to binding contractual conditions. Moreover a letter expressing intent, in its form, does not adequately suggest what the appropriate response should be. Whereas a Request for Quotation / RFQ quite literally is a Request..
It is good to use an LOI to gauge the viability of purchasing the property based on the price an terms you are considering. IN other words, it is good to use to gauge whether or not the offer you have in mind is even going to come close to making sense to the seller.