Auto Core aka Auto Core Buyer Ripoff Artist: Illegal & Unethical Business Practices Dallas Texas!!. I have been dealing with Auto Core up until recently. I have used their sercice on a semi-regular basis to purchase my catalytic converters. I have has two main issues with this company: 1) I have shipped goods to them (with tracking numbers and signatures) where they have failed to pay me; and, 2) I have gotten a quote from them, and they have not paid me what was outlined in that quote. Their business practices are both illegal and unethical. They will not respond to my emails or voicemails, nor will they answer my telephone calls. I will be taking matters further to get my money back from them. Avoid this business at all costs.