Well my Aikido lessons at $2500 a year must be way over the top!Btw i think $900 is also to much for a year of training, means you ask $75 a month (if you train 12 months a year), means €59, because i live in Holland, if you asked that here you would be the most expensive Krav Maga school in Holland, so yes you are VERY overpriced. And in my opinion for some very basic training, not worth the money.
Most Krav schools here ask €40 - €45 a month (= about $50)