Answering the "Is that Rolex Real?" question?

[Desibaba]

I have only had my watch for about 10 days but I have already been hit with the "Is it a real or a replica?" Question. I told the person Its fake and I bought it for $50 at the flea market before walking away. Lol I figured if someone sees me driving a nice new Mercedes they would know I wouldn't buy a fake watch. What do you guys say without sounding like a Douche?