Yes, state in the ad cash only. People who are honest will not be offended. Also state you will not ship and that you will deal with local buyers only. Scammers will respond, along with non-scammers. The scammers will offer more money than you are asking, in the form of a money order. They may also say they will have an agent pick up what you are selling. Very important to not even respond to them. (When they respond to the ad, they do not see your email address. When you respond back to their inquiries, then your email address is revealed.).