Investing in second-hand models often help you save money, but use these tips to make sure you don't waste your money (in which case it would have been better buying a new model listed above). Know that you probably won’t get a warranty. You also can't see the interior, so you don't know if the previous owner damaged it with misuse. If you do get it from someone, you know well, or a respected dealer, it's an easy way to save a few dollars in setting up your home. Therefore, just vet the supplier before you pay.