1988 Bryan boiler 5.5 million btu RV550-w

I have two Bryan model RV550-w water boilers rated at 5.5 million btu each and all the equipment to support a turn key boiler room. Boilers were new and installed in 1988 state inspected and maintained properly. Which includes two 15 hp circulating pumps, piping for water and natural gas, two large water pressure tanks to maintain water level in system, all regulators and fuel train. TG2028