On Shaanxi Lu, near Huaihai Lu, a lot of small entrepreneurs set up shop on the street. They sell mostly dvds, illegal copies, that will go for around 6 to 7 Renminbi. Buying your dvds here is less advisable as you can get the same dvds in real shops for the same price. If the dvd has problems or the quality is bad you can exchange it for free. If you buy a dvd, always ask if the quality (sharpness etc) is good. Avoid movies that have just been launched in the theatres and wait a bit.