6 months back when I visited Delhi, I went for a quick round of Hauz Khas market. In its vintage aura and quaint shops you can find many little interesting things - so just walk around.
Vintage film posters - Mughleazam, Chalti ka naam gaadi, Navrang and all other classics.
Vintage Travel tags of hotels, world cities and airlines. If you are a traveler and love to flaunt it then pick some to adorn your suitcases. You bags will make a very unique fashion statement.
Vintage advertisements and trays of beedi-cigs, soft drinks, soaps and other local products. I could actually identify the Red n White and Lux print ads from my childhood. Giving metal trays, tin boxes was such a fashion before 80s for corporates and advertisers and free gifts were a great way to attract middle class consumers.
A good collection of old edition books leather bound adding to the vintage look and feel. Although be careful cos the book that I liked had many tiny holes in it. I left it fearing the infestation spreading to my other books.
Overall its a treasure trove.. BUT all that shines is not Gold. So only if you have the eye for the real then Hauz Khas is the place for you.