The other comment here has the right idea about having a dive shop test used equipment, 'cuz it’s as much of a risk as buying used rock climbing ropes.
Losing a dive comp, boyancy control, or your air feed to wear and tear during a dive can very quickly become a deadly situation, and you don’t usually get a chance for function tests before buying used.
You really want to know that a used piece of gear is solid and well-maintained before you trust your life to it. If you can afford to scuba regularly, saving a few hundred bucks isn’t worth the personal risk.
The other comment here has the right idea about having a dive shop test used equipment, 'cuz it’s as much of a risk as buying used rock climbing ropes.
Losing a dive comp, boyancy control, or your air feed to wear and tear during a dive can very quickly become a deadly situation, and you don’t usually get a chance for function tests before buying used.
You really want to know that a used piece of gear is solid and well-maintained before you trust your life to it. If you can afford to scuba regularly, saving a few hundred bucks isn’t worth the personal risk.