What criteria should I use to choose an implant dental clinic?

One of my molars became loose and I was told it eventually has to be extracted, so I am looking into dental implants.

I searched online and found that there are various materials available and bone grafting might be necessary. Prices also vary widely from hospital to hospital, so it’s hard to know what criteria to use when choosing.

Since it's my first time, I'm worried about getting overtreated. For those of you in the Bupyeong area who got implants, where did you have them done?

I would like to at least get a consultation first, and I would like a dental clinic that gives honest advice.