What are your opinions? Should I trust the dive shop owner, who has been in the business for 20 years, been diving for 40, and has over 5000 dives to his credit? Or is it truly safe and more financially feasible to buy less "name brand" products, buy used, and buy things online?
Yes, no or "it depends." How's that for an answer?
The value of a thing isn't always the price you pay for it. It also includes how you're treated after the sale. While things like wet suits are generally low maintenance items, your regulator will need service every year (or two), depending on the model and brand and may need adjustment now and then.
If you value convenience and first-class service, and if your LDS provides these, then you need to figure that in to the cost of the items. For example, the shop I use will typically turn my gear around in a couple of days, (or hours if I need it). This is worth something to me because my time is valuable, and I have a low "annoyance" threshold. This means that when I bought my regs, I bought them locally and paid retail. Sure, I took a little beating on the price, but for the past 10 years, I've lost exactly zero dives because my equipment was broken or out for service.
The flip side of this is that there are plenty of places that will charge you every nickel they can get, and not give you any kind of special service in return, so the answer really is "it depends".
Another thought is that you don't have to buy everything there if you don't want to. $300 is a lot for a rubber suit. For another couple of hundred dollars, you could get a drysuit.
You certainly have the option to negotiate, although for some brands, not on price (the manufacturers have limits on what the dealers are allowed to do). For example, with the regs, you can tell them that in exchange for paying retail you want 3 day turn-around time on normal service (if that's something you would value).
You also don't have to buy everything in one place. You can buy what you think is an overall good deal and take your business elsewhere for the rest.
The "Don't trust your life to eBay" thing sounds like complete BS, but it actually isn't. It's entirely possible to get a great deal on a really nice used reg on eBay. It's also possible to buy one that someone had problems with and couldn't (or didn't) get fixed. You'll need to figure in the potential cost of a complete overhaul when buying used. This isn't to say "don't do it". I bought a really great SCUBAPro regulator on eBay for $50 that only needed another $75 in repairs. However I also bought an underwater light that burst into flames while recharging, so anything is possible.
Also the line about "not buying your computer twice" isn't complete BS either. A lot of people buy stuff, then discover it's not quite what they need and replace it soon after. On the other hand, you don't actually
need a computer. I have one and I like it a lot, but it's not a necessity. A depth gauge, SPG, watch and the tables that came with your OW class work just fine, especially since as new diver, your chances of making a tank last long enough to even come close to the No Decompression Limit are pretty slim. You can buy a computer at any time, and they're only getting better and cheaper as time goes by.
The short answer is "Don't get pressured into anything"
If it were up to me, I'd buy the best regulator that I can afford and get serviced locally, at a local shop. If you buy a good one, you can give it to your kids in 50 years. My eBay reg is a SCUBAPro MK1, which as far as I know is the first model they made and it breathes as good or better than any of my new regs.
I'd defintely buy the mask locally, since fit and comfort is 90% of the criteria as well as the other 10% and you can't do that over the net. I'd probably buy the wetsuit online. The manufacturers post body measurements for their various suits, and they're usually pretty accurate.
Sorry for sort of going off on a tangent.
Terry