What is the appropriate filler price?

These days, as I'm looking into filler procedures, the thing that worries me the most is the price ㅠㅠㅠ There's such a big difference between hospitals, and the price also varies by area, so I can't really get a feel for what the right price is. If I choose a place with cheap fillers, I worry that there might be side effects or the effects might disappear quickly, but at famous hospitals, the prices are so expensive that it's a burden. In the end, I keep having to worry about safety and cost. Can someone tell me the right price for fillers?