Per the conversation with the attorney whose firm handles the sale in Clayton Co.

A real estate broker, for the purposes of this article, is defined to be a person, firm or corporation who, for a fee, commission or other valuable consideration, or by reason of a promise or reasonable expectation thereof, lists for sale, sells, exchanges, buys or rents, or offers or attempts to negotiate a sale, exchange, purchase or rental of real estate or an interest therein, or collects or offers or attempts to collect rent for the use of real estate or solicits for prospective purchasers or assists or directs in the procuring of prospects or the negotiation or closing of any transaction which does or is contemplated to result in the sale, exchange, leasing, renting or auctioning of any real estate or negotiates, or offers or attempts or agrees to negotiate a loan secured or to be secured by mortgage or other encumbrance upon or transfer of any real estate for others, or any person who, for pecuniary gain or expectation of pecuniary gain conducts a public or private competitive sale of lands or any interest in lands.

Hiring an SEO expert is not cheap and neither is a marketing firm.

A lot of firms don't train their employees on them, but you can find some experienced folks who can still get them done. 

My firm handles real estate and estate planning matters and we are located in the northwest suburbs. 

Have a laywer or property managment company open an LLC for you and have their firm as the registered agent this keeps any personal names out of the records. 

I got it from a very old and established firm. 

Make sure the contract protects your earnest money deposit with things like loan contingencies, appraisal contingencies, etc, and that escrow isn't with his Cousin Billy or something, but a legit firm.

I work for an architectural firm that does very large commercial construction.

Yes I used to own a debt collection firm and had access to TLO, Accurint and a few other programs.