If you have an Asian community where you live - find the Asian market/store where they shop. You'll find the best price and what they use ... and they know rice cookers. Of course, I assume you're looking for an electric rice cooker.
If you're looking for a "manual" cook it on the stovetop thing ... just about any aluminum pot with a tight fitting lid.
I got mine at Kmart. It was a middle-of-the-line product. I didn't want cheap where it would work for a year and die and I didn't want to spend big bucks because we don't use it all the time. It also has a steamer rack for steaming veggies. You can get them in a range of capacity. I got a pretty large one because when I do make rice I like to eat a lot!