Illinois Wholesaling houses

[David Kors]

I'm really confused about the wholesaling law in illinois. I just can't find a good answer. I'm planning on wholesaling a property and I just can't figure out what separates me from a broker? What would make a wholesale deal illegal? Where do I get purchase and sales and asignment contract? After getting a property under contract can I advertise that property on craigslist, zillow, backpacks etc.?