Just bought a 16 GB Sandisk Extreme USB3 pendrive from Reliance Digital in Calicut for 999. It was a lucky discovery, I had gone to buy the Sandisk Ultra Go. Note: the package was old, with date of import 2012. Probably liquidating old stock.
The cheapest online is 1299.
Probably it is the same rate in all Reliance Digital Stores all over India. Worth a look.