Used rice cookers can be purchased on eBay, but only a few used rice cooker pots are typically available for sale on eBay. Depending on the brand of the rice cooker, brand new replacement pots can be purchased directly from the company's website or on eBay.
Rice cooker pots should last as long as or even longer then the cooker itself. Since most rice cooker pots are made with nonstick coatings, they must be taken care of properly so that the coating does not scratch off. One way to protect the coating is to avoid using metal utensils with a nonstick rice pot.