Cartier watches are sold through Saks Fifth Avenue, Jacob and Company, Atlantic Time, Jomashop, Tiffany and Company, Prestigetime, Bizrate, Worldofwatches.com, B. Gray Jewelers, Tag Heuer and Baume Mercier along with just about any other famous luxury timepiece. Some are sold at discount. Many are used watches and there may even be replicas tossed into the mix. It behooves the buyer to research carefully and if at all possible speak to the company owner for reassurance. Most have serial numbers and warranties. It would seem that any interested purchaser of any famous, luxury watch would need to acquire some expert advice when it comes to assuring you are getting the genuine product. But, then the replicas look just as perfect to the naive eye, and are claimed to give just as good service. Its whatever suits the buyer, I guess.