As far as accessories, and maybe some common ammo I may look at big box inc.
Most of the big box stores in my area don't carry reload supplies or optics that I'm interested in. As far as guns, not a whole lot of new stuff excites me, and my lgs can order anything they can get from their suppliers for 10% over their cost, so I usually do that.
My lgs is a husband/wife shop that travels the gun show circuit and there is no telling what he comes up with from week to week, as his used inventory always changes.
Yes he can get the new stuff, and has a good selection of polymer stocked guns, and ar's ranging from scars, daniel defense, colt and stags..
On new items his prices that he orders for me are within reason of the internet drop ship places if you include shipping and transfer....
So, yes he has kept me from going to big box stores and gun shows for awhile.
But, there are some things he does not trade for, or carry....
So if I'm looking for cz's or vortex optics or reloading supplies I have to go somewhere else.
But he does have primers. He started carrying them because he got tired of me asking for them.. and I have bought some of them.