In 10 years, M&M Core has grown from being your local core buyer to becoming the leading core buyer in the tri-state area. M&M now buys from the very people to whom we used to sell and have become an “end-user” for catalytic converters. With a willingness to travel the extra mile and the knowledge and ability to purchase a diverse inventory of product, we do everything possible to be able to pay the best price for your materials.