What is a reasonable price for Botox?

Perhaps because I have a habit of frowning or tensing my jaw without realizing it, I’ve recently become increasingly self-conscious about my wrinkles and square jaw. I’m thinking of taking this opportunity to get a light Botox treatment, so I’m looking into dermatology clinics near my neighborhood. However, after searching through hospital apps and websites, I noticed that the prices for this particular Botox vary quite significantly from clinic to clinic. I’m a bit suspicious about whether a place with very low prices will administer the correct dosage, but paying a very high price is also a burden. I’m curious to know what price range you members generally consider reasonable when visiting a clinic for Botox. I look forward to advice from those who have had a successful and reasonable experience.