It's really hard to be good and cheap. It depends on what kind of appliance you use and your teeth. If it is cheap, choose the most common Kouga, which is cheaper than built-in lingual orthodontics such as eBrace. The cost of orthodontics ranges from thousands to tens of thousands, depending on the complicated procedures of your teeth. Even if it is corrected, it is estimated that it will not give you an accurate price. After all, everyone's teeth are different. Some people may have their teeth pulled out, and some teeth must be filled first if they are broken. All these will cause expenses. Teeth are accompanied by life, I hope not to be greedy and cheap. Find a regular dentist and have an orthodontist check first.