I purchased these machines some years ago from a school district auction. I bought a total of 3 of them and have used only one of them through the years. The story behind them is that the school district purchased them to keep their gym floors clean. It was found out that the machines would not be compatible with the floors installed due the rubber compounds they were made from. They stored them for several years without use. They have a 5 gallon on board tank and are good for stripping and deep cleaning of vinyl floors and have 2 opposing rotational brushes. Also they very long cords. The price below is for one machine however let me know if you are interested in all three. I found out that these sold new for ,400 per machine.