The unpopular categories on Taobao are as follows:

1. Earthworm machine, generally used by people who like fishing to collect bait. The recommended price is between 100 and 300.

2. Colorimeter, generally used by leather factories to adjust color difference and contrast colors, the recommended price is around 1200.

3. Propeller thruster, generally used to increase the power of the ship, the recommended price is between 100 and 200.

4. Ant King Coffee, this is a gray product, it is not convenient to introduce, the recommended price is between 100 and 200.

5. Voltage stabilizer, generally used to stabilize the large power consumption, resulting in unstable voltage, the recommended price is between 500 and 1000.

6. Pig drive, generally used by pig farms to drive pigs, generally bought in large quantities, the recommended price is between 150 and 300.

7. Metal detectors are generally used for security checks, metal detection instruments, and underground treasure hunting instruments. The recommended price is between 300 and more than 1,000.

8. Sports cameras, mountain bikes, mountain motorcycles, used for recording, the recommended price is about 300 to 3,000.

9. Hollow drums, a kind of ethnic musical instrument, the recommended price is about 150 to 300.

10. British sweatpants, a kind of boys' health underwear, the recommended price ranges from 100 to 500.

11. Hand-rolled piano, a special piano that can be stored and used conveniently, the recommended price ranges from 200 to 800.

12. Glass door floor spring, a glass door accessory, the recommended price is between 60 and more than 100.

13. Underwear disinfection, generally used for ultraviolet disinfection and drying of underwear, the recommended price is more than 100 to more than 600.