Wow this went downhill fast while I drove home from work.
Since some of this was addressed to me I'll respond.
If you have it in stock, I can agree that some sort of "stocking profit" should be built in to your cost structure. But my last shop stocked nothing high end but display models. Why, most times, we had to order it anyway because someone wants this pin length or that top weight. So if you are ordering it, no, you don't get to make any more profit than the guy ordering it himself from internet. Now if your expertise is used in deciding what to order, then you add a service fee. This was posted and people didn't mind because they knew what they were paying for.
It seems like what you want is profit built into the product to start with. And if the market supports that. No problem.
Sort of like Lawyers. First consultation is free, but they make up for the free stuff later on. Just have to think of other ways to profit. Other pro shops seems to have found a way??