Buy and Sell Luxury Watches at Watchmaster - Your Expert for certified pre-owned, new and vintage watches online. Rolex, Breitling, Omega & more Brands. The certification for every watch we sell takes place entirely at Watchmaster's Service Center in Berlin, Germany. Our in-house team of senior watchmakers follows a refined authentication and refurbishment process. We pay attention to every detail and publish the best pre-owned luxury watches on the market.