Electric lawn mowers are available at a wide range of prices, although corded models tend to be cheaper than battery-powered options. Corded mowers also won't require any additional battery purchases over time. Size also plays a part. Large riding mowers can cost thousands of dollars, while smaller, compact machines, like the Sun Joe MJ401E-PRO, our recommendation for small yards, can be found for about $140.  Neither requires the fuel or oil that gas-powered models do, which should cut down on the overall expense of the mower. However, the long-term cost of replacement batteries — which can cost hundreds of dollars — should be considered as well.