The price of a gypsum board production line can vary depending on several factors such as the production capacity, quality of equipment, manufacturer reputation, and geographical location. Generally, a small-scale production line with a capacity of 1-5 million square meters per year can cost around $500,000 to $1 million. A medium-scale line with a capacity of 5-15 million square meters per year may cost between $1 million to $3 million, while a large-scale line with a capacity of over 15 million square meters per year can cost more than $5 million.
However, it is important to note that the price should not be the only consideration when choosing a production line. Quality, reliability, and after-sales service should also be taken into account to ensure that the equipment runs smoothly and efficiently, and to minimize downtime and maintenance costs.