You can buy a juicer in several places, here are some common options:

1. Appliance Store: You can go to your local appliance store, such as a large supermarket chain, Appliance specialty stores or home furnishing stores. These stores usually have a variety of makes and models of juicers to choose from.

2. Online retail stores: Online retail stores such as JD.com, Taobao, Tmall, etc. provide a wide range of choices. These platforms allow you to browse different brands and models of juicers and view reviews and feedback from other users.

3. Manufacturer’s official website: If you have a preference for a specific juicer brand and model, you can directly visit the brand’s official website. Many brands offer online purchasing options, and you can get more information about product specifications, warranties, and more.

4. Second-hand market: If you are interested in a second-hand juicer, you can try to find it in the second-hand market, second-hand trading platform or offline second-hand store. Please make sure to check the status and functionality of the device and fully communicate and confirm with the seller.

When purchasing a juicer, you can consider factors such as budget, power, capacity, features, and ease of cleaning. Reading product reviews and comparing different options can help you make a more informed buying decision.