$50 per lesson, which is actually quite cheap for my area ($55-60 is typical). Technically half hour privates, but they end up being more like 40 minutes since my trainer doesn't have anyone after me. I ride school horses and ride hunter/jumper.
ETA: Puck, where in CT do you live? I live in Fairfield County and recently started lessons again and $50 for a half hour was by far the cheapest I found. Though I'm assuming your lessons are done on your horse, which would explain the reduced rate.
ETA2: I wouldn't mind group lessons, but at my skill level I find it very difficult to find a good group. Basically, people who have been riding as long as I have usually have a horse of their own and get to ride much more frequently. The groups I've found tend to be more of a beginner level or a very advanced level with people who own their own horses and jump much higher than I do.
I can either pay $10 for an hour lesson or work off my lesson by doing chores around the barn. And I can use either my horse or a school horse, but usually people use the horse that they are assigned to(the horse unofficially becomes "your" horse).
The lessons are usually one on one, I've never seen a group lesson.
It is $30 per lesson which lasts about two hours. Or you can pay $250 for a block of 10 lessons. Private lessons cost $50 and also lasts two hours. You can either use your own horse or one of the lesson horses.
But I work up at the stable I ride at so I get free public lessons.