It depends on the size of the purchase and the manufacturer. If the small money detector is ordinary small money, it ranges from 200 to 1000.

Banks are more expensive and commercial ones are cheaper. Commonly used banks like Shanghai Gufen Zhejiang Roewe, Shanghai Yue Ling, Jiangsu Speedway, Liaoning Anshan Julong, Liaoning Donglian Maker, and China Banknote Cinda are all five or six thousand yuan. Commercial strength, confidentiality, etc. It's all one or two hundred dollars.