Why go
Start with the kind of purchase you want. Colaba Causeway works for a walk near the Gateway of India with stalls to browse; Chor Bazaar is more about examining older objects and their condition. Linking Road in Bandra shifts the focus to clothes and accessories, making it a separate shopping outing rather than an extension of a South Mumbai walk.
The full story
For souvenirs during a South Mumbai visit, Colaba Causeway is the easy pairing with the Gateway of India. It is a street-shopping experience, so compare several sellers and inspect workmanship before paying. A shop or stall displaying similar items at different prices gives you a useful basis for deciding what an item is worth to you. Chor Bazaar changes the question from “Which souvenir?” to “What is this object, and what condition is it in?” Its vintage goods and curiosities are spread among independent traders. Allow time to look closely at repairs, missing parts or wear, especially for a piece that appears old. Linking Road in Bandra is a different choice again, centered on clothes and accessories across stalls and regular shops. Its location makes it a distinct trip from the Fort and Colaba markets. Fixed-price retail can be easier when you need a straightforward transaction; street markets reward patient comparison. No single market has a stable stock list, so choose by category and neighborhood rather than travelling for a product you have not confirmed is there.