That really is a good point. I tend to buy my guns as bargain finds and then start hunting for holsters, mags, etc. as bargains to be found as well. This satisfies the collector urge in me, but it's probably not the smartest way to go about it.
Having the gun on you when you need it should clearly be the first priority.
That's the kind of service a craftsman gives that most manufacturers usually can't even if they'd like to do so.