Hi Melisa. Although I’m not in the market for your medicine balls, I noticed that you’ve received no ‘hits’ for your question here. You may also consider placing a quick local ad (if you haven’t already) on some of the popular online sites. I know that this is how I’ve found some of the ‘used’ fitness equipment that I’ve purchased over the years, and so this may be helpful for you as well as the seller.
I hope that this helps.