70 (or more) including my other instructors.
Including:
4DS, the LIS series, STC series, Crossfire, To the Max, Cardio Hits, Cardio Classics Vol 1, Intensity, CCC, Circuit Blast, HIIT, LIC (original), SJP, CTX, LM, KM.
I also have a lot of other instructors:
I have three Leslie Sansone dvds for low impact, inclement weather. Walking, jogging, band work, and weights.
Kathy Smith: I have most of her older workouts on DVD plus pilattes, kettlebells, Aerobox, and step circuits.
Shiva Rea: I think I own almost all of her DVDs. They range from incredibly intense to less intense. I think of them as a part of my meditation practice, rather than a workout (although I won't do them on the same day as weights.)
Jillian Michaels: Ripped in 30, Shred it with weights, Banish fat boost metabolism, No more trouble zones.
I still have my old VHS tapes. I have Billy Blanks, I have Step Reebok (got me started!), the old Jazz Workout, the ballet workout, the Buns of Steel Step Workout 6, 'Kick it' (my first kick box workout.) I still love Petra Kolber and Gin Miller. I also have Salsa dancing and belly dancing.
Not to mention the online sources like yogatoday.com