as some have mentioned, its the supply and demand issue and I think I agree... thats got to be it.
I just brought this up because I was doing bjj for 2.5-3 years and I loved it, the instructor and the people there, but the prices were always going up, so I stopped and did other sports.
Then when I called my place they quoted me a price that again was higher, so I decided to check out the local boxing club and the guy was just like come by try it and then I find out its like $35 per month lol and I sign up for the year on the spot haha.
BJJ being my first martial art, I was so dazzled by the coolness of bjj, but just giving boxing a shot, I've found its just as rewarding and much less expensive. I've also decided of all the martial arts, boxing is the sexiest, I use to think BJJ was, but nothing marcelo garcia, or cobrihna, etc can do that would more amazing than RJJ or Ali or Floyd, thats my opinion.
So I just wanted to share that... and for the guys that love to train and are hard up for money, find a judo place, you might be surprised at how good your bjj will get when doing judo. The place I went, I got beat up so bad by the teenagers it wasn't humiliating cause they were amazing, but it actually was so painful getting thrown, I actually had to bow out for the night during randori, and I never did that in BJJ lol. It did really harden me up, especially since judo guys spar like jerks ie.you feel you're in a real fight- very good and different style of sparring.
Best part is, if you really love BJJ and come back, you'll be tossing everyone all over the place, great feeling!!!! I swear.