I had been once before with my husband and we lead our group through rows of vendors selling current wares to get to the vintage and antiques section which is a few blocks walk from the Metro station.
There are alleys leading into rows and rows of vendors that are marked with signs that look like the one below.
Here is a photo journal of what we saw:
Just after we started browsing the narrow aisles of vendors it started to pour rain! We took cover in one of the shops and waited for it to blow over.