Cinjodi once bubbled...
...This also scares me off of buying my own gear new from a dealer because I know that simply taking possession of it (like a Cadillac off of the lot), it loses at least half of its value. Very Scary. Almost enough to make me reconsider and only rent my gear for the few times that I might use it....
These are considerations and only you can make the decision that is right for you. I would argue that the decrease in value from diving new equipment is irrelevant. You will most likely dive the equipment (new or used) until it is no longer usable. Therefore making the paper loss in value irrelevant.
Each of us must make the decision that is right for us, our experience, expected type of diving and pocket book. But I am concerned that you may be over emphasizing the money aspect. You are not investing for profit here, you are investing in
life support equipment .
But before you make your final decision, let us review some relevant numbers.
Cost of new equipment. Advantage: If purchased for licensed dealer, mfg warranty, and implied years of use if properly maintained. You know its maintenance history. Disadvantage: Paper loss of value when you walk out door. Value decreases with age and improvements in technology. Cost of annual service.
Cost of used equipment Advantage: Cheaper. Disadvantage: No warranty, unknown maintenance history, reliable? Value decreases with age and improvements in technology. Annual service cost.
Renting equipment every dive: Advantage: if you dive infrequently this is cost effective. No annual service cost, no purchase cost etc. No decrease in value. Disadvantage: Every dive you have different equipment, you are not necessarily familiar with and of course the cost of renting equipment every dive. If you get a different model or brand one dive, you could find yourself having a problem, with gear you dont know by heart.
And finally, before we squeeze the last penny out of the purchase of equipment, consider the cost of a funeral. I put that in just to keep things in perspective. This is LIFE SUPPORT equipment you are buying. Cost is a factor, but safety and reliability should be the first consideration and last. Buying quality, reliable equipment is cheap compared to the cost of dying.