If you need to buy a new mower, there are several ways to narrow down your choice. First of all, the size of the lawn should be the most important fain your decision. If your lawn is small, you might want to consider buying a human powered or "hand" mower; it's good exercise for you and it's a "green" choice for the environment. If the lawn's a little too large for that, but not really expansive, then a small gasoline powered mower with a 16-20" cutting area will probably do just fine.