I did a bit of legwork. Harminder Singh seems to have moved to Karol Bagh. I never got a chance to visit his shop.
I went to the NR Pen store in CP. The prices seemed a bit more reasonable than Nehru Place but I still wasn't sold on their products and pricing. The conditions of the 45 Flighters that I was looking at were a bit hit and miss. I did see one nice piece, but the older shopkeeper was a bit grumpy, rude, and too eager to get a hold of my money. For some reason, I decided to hold off on buying anything from there.
Then I ended up at Pens Point in South Ex and was pleasantly surprised. Got a 45 Flighter CT with the original aerometric converter for Rs 1000, with everything in excellent condition. I also saw a quite a few rare pens at various price points that I could not find at any other shop. Every single thing was priced at exactly the right price, unlike at the shops in CP and Nehru Place. The shopkeepers are really friendly and have a genuine passion for fountain pens. They really pride themselves on their collection and their quality of service, and rightly so. I don't think I'll have to go to any other store or website for a very long time while these guys are around.
Edited by lordofnumpties, 05 February 2017 - 19:09.