Agra is well known for its marble items inlaid with coloured stones, similar to the pietra dura work on the Taj. Sadar Bazaar, the old town and the area around the Taj are full of emporiums. Cheaper versions may be made of alabaster or soapstone and are less durable.
Other popular buys include rugs, leather and gemstones, though the latter are imported from Rajasthan and are cheaper in Jaipur.
If you arrive at a shop without a rickshaw driver or guide, ask for a 20% discount, as you're saving the shop an inevitable commission.