Make your opener as personal as possible. Focus on three things: State your intentions, show that you have the financial means to make the purchase and make a personal appeal to the seller.Craft a winning house offer letter with our customizable template and tips. An Illinois purchase agreement is a standard contract for selling real estate from one party to another. Customise your individual Offer to Buy Real Estate Settlement online. Print or obtain your settlement free of charge. Ready to put a bid on your new property? Download FortuneBuilders' free real estate offer letter template so your proposal stands out.