If it is a die-cast bronze mirror made by modern technology, it is around 50 yuan.
If it's a solid bronze mirror without glass, it's relatively close, with a diameter similar to that of a CD, about that of 200 yuan.
If it's a bronze mirror, the imitation costs thousands of dollars, and if it's genuine, the price is at least tens of thousands.
In the absence of size and pictures, I can only quote you a reference price like this, hoping to help you.