Knowledge is power.
I know an AC manufacturer in Hyderbad who purchases all standard components from the market and he will assemble them in his factory. I know him well and he was selling the product at a very competitive price. I purchased an AC from him in the year 2000. Even today it is in working condition without any complaint. In between once or twice the gas was filled. 21 years of working. What more do you expect from an AC which was assembled. But he closed his factory as no buyers for him.