I'm planning to get my underarm laser hair removal done again. Are there any places currently running price promotions?

I had laser hair removal on my underarms a few years ago, so I was able to spend the summer comfortably.
However, as time passed, thin hairs started growing back little by little.

The hair isn't growing back as thick or heavy as it used to be, but since it's visible, it bothers me, so I've been shaving it off with a razor every time I shower these days. However, having to remember to do this every time is actually a hassle, and it feels like it's irritating my skin, so I'm thinking of just going to a dermatologist to get laser hair removal done cleanly again before it gets even hotter...

Based on my memory of when I first received treatments, I think I got them consecutively for about 5 to 7 sessions. I am wondering if I need to complete the full 5 to 7 sessions just like I did initially to maintain the effects, even though my hair volume has significantly decreased and the texture has become thinner due to previous treatments. Or would it be okay to just get a light treatment of about 3 sessions while monitoring my condition?

I am looking into western areas like Gari Station, Yeongdeungpo, or Yeouido because they are close. Please let me know if there are any places offering laser hair removal price promotions.