anyone had good experience with a group buy deal?

I’ve tried 2 different deals from group buy sites for laser hair removal and neither has worked at all. I’m wondering if these are usually a scam and they do a crappy job because I’m not paying very much. Has anyone bought a deal like this and had good results?

I got one deal for 4 treatments with a Candela Gentlelase, which I thought would be great for me since I have very pale skin (type 1 or 2) and dark hair. I shed minimally after each session, but in the end it looked like the same amount of hair. Then I had 2 sessions with a Soprano XL and I shed a lot, but not all, after the 2nd session, Now a few months later it looks the same as ever.

I guess I just want to know if its worth trying another of these deals, or just spend way more that I can afford getting regular priced treatments.