For all practical purposes it's custom pricing. Just put aside an hour or so to have the discussion with them about all the possible options. Look at the channel list and decide what are your "must haves", your "nice to haves" and your "I would never watch thats".
Then just go through a series of "what if I had this combination" discussions with them until you can work out what works best for you. The agents have dozens of plans and special offers to choose from so it isn't easy for them either.
Bear in mind that the commitment term you are prepared to take can make a difference too.
Personally, as a guide on price, I recently signed up to this combination for a total price of $310/month on an 18 month commitment:
All the "free" channels
All the HBO & Cinemax channels
All the Discovery channels