I have no interest in any dive shop, and I do not even try to make other people's ethical decisions for them. I make them for me, and I express my feelings.
Gyanni, I think you'll probably end up where most of us are . . . Deciding you want to buy a regulator, reading reviews of regs on line, looking up prices on regs at places like ScubaToys, and then going in to your LDS and telling them which regs you are interested in and what you can get them for elsewhere, and asking if they will match or nearly match the price. For things where fit isn't important, you can read about all the pertinent features (eg. regulator performance) and even check if durable items are readily available used (classified, e-bay). This is what I do, and what many of my friends do. But when I buy a new wetsuit, I trot down to the LDS and buy it, knowing I'll pay a premium. It's just how things go.