The Audemars Piguet Royal Oak is an icon of high-horology, and the Chronograph models (especially in stainless steel) are extremely sought after for their distinctive octagonal bezel, integrated bracelet, and "Tapisserie" dial. Like the Rolexes, this model is typically sold far above retail price due to intense demand and AP's low production numbers, and it will be one of the easiest and most valuable watches in your collection to sell.