Centra Corporation has been selling machinery Since 1988, The Founder and President Ed Mazzetta has been selling machinery for over 30 years and is a Certified Machinery & Equipment Appraiser (AMEA). Edward was past chairman of the Philadelphia Chapter of MDNA (Machinery Dealers National Association) and a former Board Member of the National Office of the MDNA. Salesman, Michael DiBlasi has been with Centra since 1992. Michael is a Past Chairman of the Philadelphia Chapter of MDNA, and is an Certified Machinery & Equipment Appraiser (AMEA). Office Manager, Elaine Mazzetta, answers your calls and takes care of the daily activities necessary to run our company. We Hope We Can Do Business With You. We belong to the following organizations: AMEA, MDNA, BBB and an eBay Power Seller.