Craigslist AD posting needed for US major cities

Looking for someone to post ads on Craigslist for my business- under the section - computer services. I am a startup owner that specializes in Microsoft Excel custom work and need to start marketing m Looking for someone to post ads on Craigslist for my business- under the section - computer services. I am a startup owner that specializes in Microsoft Excel custom work and need to start marketing myself to get more business. I have content already created- just need someone who can post my ad and make sure it stays active an...