The pricing of machines for sleep apnea treatment varies according to the type and manufacturer of the machine and the price of the country. There are domestic and imported ones, and the general price of a domestic machine is between 7,000-8,000 and 15,000 dollars. Single level ventilators are cheaper, bi-level ones or those with a back-up frequency cost more, and servo type ventilators are more expensive. Imported ventilators are generally a bit higher than the domestic ones, i.e. single level ones i.e.$8,000-9,000 and bi-level ventilators around$20,000. Some very cheap respiratory machines of 2000-3000 yuan and 3000-4000 yuan are often seen in the market or online are actually refurbished machines. There are some unscrupulous merchants, the machine shell reloaded, so the very low price is sold to the patient. A lot of patients who buy such a machine outside for the sake of cheapness will have their condition aggravated after treatment. So the price of non-invasive ventilator or to the regular company, regular hospitals, and then through the doctor’s adjustment found suitable for what ventilator, and then go to buy.