Hi Linda,

Too many reasons to list but the most obvious ones might be that one car has higher mileage, or doesn't have a complete history, or one comes with a decent warranty and the other doesn't or just that a particular dealer has a car they want to get rid off so they're selling it at a knock-down price. You're right to be wary though - there are no free lunches out there and if a price looks to good to be true, it should sound an alarm for you.