The price is $1295. Seemed pretty fair for me. We started at 8:30 - on the track by 9:00 and finished at 4:30 with about an hour to hour and a half for lunch and more classroom instruction (instruction was limited to 2 30 minute sessions). We tore the tires off the cars, abused the brakes and ground the gears - they emphasized over and over - NYC (not your car) - drive it hard and don't worry about hurting it.
Anyone can participate. You may want to wait until this Fall. My guess is that they'll add the new M3 to the fleet (probably in place of the M-coupe). We were supposed to have M6's as well but their fleet was water damaged (the cleaning crew left the windows down and sunroof open during a huge thunderstorm!).
They also have a 2 day version. Either the 1 day or the 2 day qualifies you for advanced M-school at Virginia International Raceway. I'm saving my money right now!