Used cars aren’t for everyone, but the potential savings are huge. In her book Save Big, Elisabeth Leamy says buying used can save you about $10,000 if you’re looking for a basic automotive workhorse, and more than $30,000 if you’re in the market for a luxury vehicle. Since cars depreciate most quickly in the first three years, even buying a car that’s a year old can yield significant savings. The same holds true for grown-up “toys” like boats and motorcycles.