Tripods and their heads seem to be like a pit into which you throw money. I have a few, and I think that I recovered from the addiction eventually ....
I have one called a "Benbow" which I don't think can be bought any more. It is based on the 'bent bolt' used in wartime Bren Gun mounts. This bent bolt allows the legs to be adjusted in almost endless directions. But setting it up is a bit like wrestling with an octopus. Marvellous when you win. I suspect that most buyers bought better known brand names with their own simpler leg extension structure which is mostly good enough for 90% of occasions. But I would never part with my Benbow as whilst I have hardly used its finessed leg angles it is a pretty clever idea and it is a great tester of one's patience mettle. Like many Chinese puzzles it is the puzzle of getting there successfully that is more rewarding than even fixing the camera on top of it.
Those interested in the ultimate tripod set up struggle might be able to find a Benbow for sale somewhere. Most of these users will either already be mad or have Leg Adjustment Certificate #5 Level Diploma from the Tripod Society to hang on their wall.
I have paid as much as $800 for a great Heavy Duty Manfrotto, but my little cheap Velbon baton type monopod has had much more use and gives great feedback.