Mainst Alliance LLC purchased a 135,203-square-foot industrial facility at 500 W. Main St. in Alliance, OH, from Robertson Heating Supply Co. for $1.4 million, or nearly $11 per square foot. The former owner leased back 40% of industrial space. The building was built in 1977 and is on a 6.62-acre lot. The clean and well maintained facility features a maximum of 24-foot clear height and is equipped with heavy power 1,200 amps, 208 volts and 3 phase.