BUYING & SELLING QUALITY USED MACHINE SHOP TOOLS, FABRICATING EQUIPMENT & CNC MACHINERY. Blackhawk Machinery Corp. / BMC is a buyer and seller of used machinery for the manufacturing industry. For nearly 25 years, BMC has been proud to provide quality service to our clients. Whether you are in the market to buy or looking to sell your surplus assets, BMC is available to provide a large selection of quality used machinery for your consideration and has in place a number of options to turn your idle equipment into cash.