Quite Interesting place to visit for electronic items. Cost to Cost shop is a very good place to buy computers parts, accessories and home security like bullet and dome camaras, DVR and other accessories at right price. Whole market is full of shops selling electronic and computers. But be careful not everything is genuine. One must asks for genuine vat bills to get genuine products and peace of mind. I just remember. There are dozen shops opposite Kalka ji mandir petrol pumps where on can find all shorts of fabrics to make samples of garments.
The best market to buy your computer related products. Prices are way cheaper than the internet. You'll need to bargain to get the best price and have prior knowledge about the product.