Buying luxury watches online can be one of the most exciting purchases you'll ever make — or one of the most expensive mistakes. The pre-owned luxury watch market is full of incredible deals, but it also attracts fraudsters who prey on buyers who skip the basics. Whether you're hunting for your first Rolex or adding an Audemars Piguet to your collection, this guide covers the 10 most common pitfalls in online watch buying — and exactly how to sidestep every one of them. 1. Fa