The price of roller coasters on Douyin varies depending on the design, materials, and features. Some simple models may only cost a few hundred yuan, while more complex designs may cost thousands of yuan or more. The cost of purchasing a roller coaster depends on many factors, such as the size, quality, and safety of the roller coaster, as well as the brand reputation of the manufacturer. When purchasing a roller coaster, you also need to consider its maintenance and operating costs. In general, the price of roller coasters on Douyin is very flexible and needs to be determined according to specific needs and budget.