And where, exactly, would one put the knife so that retailers would still be profitable?
In overly-broad general terms, we have to re-think our relationship to our customers and what we mean to them. We need to be a partner with them in diving.
I was on some business panel one time (and I've written about this too) and said that if there was a law passed that you could not certify people at all at any level for the next 12 months, most stores would go out of business because their business model depends on them selling gear to customers. And the other problem with that, is that the gear is pretty good and durable. I mean, how many regulators are you going to buy over the lifetime of your diving career? Unlike the camera industry, which churns out new features and abilities all the time, diving gear hasn't really changed all that much over time, certainly not in the last 30 years or so.
When Atomic first came out, I remember having a discussion with Doug & Dean (and for the sake of full disclosure, I dive with an Atomic T1, I think they're FABULOUS regs, and I recommend them regularly) and I told them - somewhat tongue-in-cheek - that I didn't need a $1,500 reg that would last a lifetime and perform flawlessly, because once I made that sale to that customer, there was no more gear money to be made there. I told them what I needed was a $199 regulator, that worked great for a year, but would break down after that, and which couldn't be serviced, so you'd come back and buy another $199 reg.
And, in all seriousness, selling gear is likely one of the WORST things we can do for customer retention, especially if you don't have much of a local/foreign travel program. You sell gear to them (hopefully), maybe they service it once in a blue moon, but you've basically gotten all of your money out of them. Instead . . .
Don't sell them the gear, RENT them the gear every single time they want to go diving. YOU only will have top-of-the-line stuff in your rental department and you'll have plenty of it. YOU will keep the gear cleaned and serviced and in tip-top shape. They come in on Friday to pick it up (you will, of course, have pre-pulled everything and will have it in a bag for them to take - all they need to do is confirm everything;s the right size and works to their satisfaction), then they go do their diving, when they come back, YOU will be the one to clean the gear, fix anything that went wrong, and be ready to rent it again.
One of the methods used by conservationists to discourage people from killing sharks is to explain to them that when they kill the shark, they make money once. But when they take tourists out to see the sharks and leave the sharks alone, they make money over and over again and in the long run, create a healthier environment as well as make more money.
The same principle applies to a retail dive shop. Get away from this idea that EVERYBODY needs to own their own gear. You make money once. Have them rent gear from you. Less of a cost for the customer, keeps them coming back into the store for a better relationship and perhaps some accessory sales, they always get top-of-the-line stuff, you'll make more money in the long run with repeated rentals, and at the end of a year or two, you can sell off the gear to those avid divers who dive every single week and for them, it IS financially better to own stuff. But you've also now cemented in their DNA that you're "their" store.
Think of when you travel to a different city. You land at the airport and do you go to the nearest car deal and BUY a new car because you need to drive around for a few days? Or do you go to a car rental place and RENT a car? Same general principle can be applied to the dive industry.