Two words - Benarasi sarees! Indian weddings are incomplete without these heavy, gleaming, glossy yards of cloth. The silk sarees inlaid with gold brocade are intricate, each pattern unique. To scour some of these, visit the Temple bazaar and government-run emporia at Godaulia, Lahurabir and the Chowk.
Varanasi is also famous for its brass-work. Check Thateri bazaar for murals and other articles. Otherwise just stroll down the lanes in the heart of the city and marvel at quirky objects on display.