The price difference for Botox is so huge that I'm really struggling to decide where to go!!

I've been looking around lately to get Botox, but the price differences are so huge that I'm really confused.

Specialized clinics in the "Botox mecca" or those famous for their procedures quote 200,000 to 300,000 won per area. On the other hand, if I look at the promotional prices at clinics near my home or large, factory-style hospitals, they come in the 10,000 won range, or even down to the few thousand won range, to the point where I think, "Is the difference really this big?"

Factory-style clinics seem like a good option because they are affordable and easy to get, but I am a little worried that the consultation might end quickly with just a manager's call before I even get a proper look at the doctor, or that I won't receive personalized care. On the other hand, at places known as "holy sites," I imagine the director would provide excellent one-on-one guidance on the design and meticulously check the dosage and treatment areas, but since the price difference is more than tenfold, I am hesitant to pay right away.

Even though it looks like a simple procedure involving just an injection, I’m actually quite concerned about side effects, developing resistance, and my facial expressions becoming unnatural... When getting Botox, do you all tend to go to "factory-style" clinics that strictly ensure genuine products and the correct dosage, or do you opt for a "holy grail" clinic that pays a little more for a well-tailored design? I would really appreciate honest reviews or tips on choosing a clinic from those with actual experience!