It's under Pricing in the FAQ page (the gist: contact them via the contact link to discuss a price, because it's apparently too complicated to estimate), but yeah, the FAQ seems like rather an odd place to relegate such an important aspect to.
A quick translation: "pricing not on the front page, because contact us" -> "we have an enterprise sales model, which means that if you won't pay six figure prices, forget you ever saw this product".
Not always literally true, but a good rule of thumb; you can't really sell $100-$1000 products that way, the cost/time of salespeople doesn't work out in that case.
