3 deep-sea personal submarines

The Ocean Pearl, the C-Quester 3, and the OrcaSub are 3 submarines for personal use which either are or will be available within a year or two, depending on model.
They do admittedly cost "slightly" more than the average person can afford....., but on the other hand they are not your average run-of-the-mill , hobbyist experimental submarines either, as their maximum operating depths vary between 100 and 700 meters
(yes, that is 700 METERS, and not feet...) and have endurances of between 6 and 12 hours.

Entry no.3 does hold special novelty value, as it possibly is the first real-life sub to emulate in both shape and performance the small shark-shaped one-man sub invented by professor Calculus in the episode "red Rackham's treasure" of the TinTin comic book series by Herge