R.M.
I would be really cautious about buying an IPL treatment on Groupon. I saw one recently, which was going for something like $250 less than I had seen it other places, so I googled the doctor offering the treatment.
She had a 2 out of 5 star average, with most of the reviews being negative. These procedures can cause scarring if not done by a professional. Do your research and spend the extra money.
If it seems too good to be true, it usually is.