When you're ready to buy a home, making an offer is important: oral promises are not legally enforceable in real estate sales. Work with your agent to submit a written offer based on local market value, specifying how and when the steps in the purchase will happen.An Illinois residential purchase agreement is a legally binding contract between the buyer and seller of a residential property. An Offer to Purchase Real Estate sets out the terms of a proposed real estate deal. Create yours now with our free form. I'd like to hear comments on how to make my offer more attractive. What is the legal address? Contact us: Reach out to us at 815-488-6373 or fill out our online form with some basic information about your property. Fill out the quick form below or call us at (309) 256-4548 to get an offer on your house TODAY! Sellers are required to complete a property disclosure statement in which they respond to questions about the material condition of their home.