The price of hard gold PCB varies depending on many factors, such as hard gold thickness, size, process, material, etc. In addition, prices may vary between manufacturers and regions. Therefore, a definite answer cannot be given.
Generally speaking, the price of hard gold PCB is higher than that of ordinary PCB because the production process and material cost of hard gold PCB are higher. If you need to make a hard gold PCB, it is recommended to contact the relevant manufacturer or PCB manufacturer for a quotation based on specific needs and specifications.