As per this craigslist post, you are based out of San Diego as well. I live around 2 hours drive from San Diego and happy to meet you at your store and buy the product. Please let me know if it works.
While they are probably scamming, it's idiots like you that make scammers look smart.
The clearly say in the Craigslist post you linked to that they are "located out of Chicago." They've simply advertised to San Diego residents on Craigslist.