They are classic and retain value more than almost any other bag. Here are tips on detecting if the vintage Birkin you're eyeing is authentic ... That's a telltale sign that something's amiss.

the manufacturers of the bag have not marketed it or referred to it as a Birkin dupe. Here's what you need to know about the OG Hermès Birkin and its Walmart lookalike. A model carries a Hermes ...