Buy A Used Car from Texas Auto Center - Texas Used Car sales: (512) 280-5333 Austin (512) 878-0888 San Marcos - Texas Auto Center is proud to serve the automotive sales, service and parts needs of Used Car customers in and around Austin , San Marcos & New Braunfels , Tx We Offer a free two year warranty on every vehicle , Free Car fax and free roadside assistance. Give us a call today.