Comfort Zone heaters can be purchased at Walmart and Amazon. They can also be purchased on eBay both with a "Buy It Now" feature or by bidding auction-style.
Walmart's website offers customers a number of Comfort Zone heaters and comparable brands. The site lets customers search based on the price, customer rating and best match.
Amazon allows customers to search for Comfort Zone heaters by name. From there, customers can add the heater to their shopping cart, read customer reviews or research related products.
On eBay, Comfort Zone heaters are sold new and used by companies and private sellers. Customers can choose to watch the bidding of a heater to see how high it gets or place a bid right away.