I am not sure, but I think you are talking about "For Sale By Owner' listings on the internet. And it can make a realtor's job more difficult. We have fiduciary duties to our clients. When we bring a buyer to a For Sale By Owner we only represent the buyer, not the seller. Again, I am not sure how you do things in Illinois, here in New Jersey we often use attorneys for real estate closings so that makes it easier here as the seller will be paying his attorney to do the things might otherwise be done by their realtor
I do bring buyers to For Sale By Owners who are cooperating with realtors and offering a commission. However, I would ask you to consider this, when I list a property for sale I market it not only to the public through internet sites like Trulia, but I also market it to the 17,000 realtor members of my Multiple Listing System. That means you don't just have ME looking for a buyer for your home, you have all 17,000 realtors working on your behalf. Just something to think about.