Although not required, a Home Warranty covering such items as the hot water heater, disposal, furnace and dishwasher, is recommended when buying a re-sale home; and can be purchased by anyone for only a few hundred dollars usually at the time of the closing.  In some instances, you will see where the Seller has placed the warranty on the home during the listing period, which indicates that they will be supplying you with a warranty at the time of purchase.

To get some insight to see what exactly is covered take a look at Fidelity National Home Warranty.