We got great little crops of zebras, rasboras and neons from the PetSmart between Chapel Hill and Durham but lately those same species have not looked good enough for us to increase shoal sizes from there unfortunately. But I do pop in to the bigbox stores when I'm going by, just out of curiosity more than any likelihood to buy.
I'm made it a point to visit the farther away ones but have nothing great to report. One of the best in this area of the east coast was AquaMains in Greensboro but sadly it was sold and is now being changed from what used to be highly aquatic into more of a "pet" store by the shopping center owners who are just trying to keep it alive, as is happening to so many good shops. There are a couple of Raleigh shops I've still not explored and I still hope to check out some of the shops in Charlotte and area that RDD has explored.
I think somewhere on TFF there are threads where you can record up to date data from visits to individual shops and I suppose we'd all be better off if we bothered to take it upon ourselves to continue to do this low-level work. I'm guilty of not doing it. In the world of reporting swimming pools for lap swimmers there's the same sort of grass-roots reporting of info that's gone on for ages, lol.
~~waterdrop~~
ps. edit: forgot to say that of course many resort to having fish shipped from DrFoster and other web outlets for their more unusual ones or of course the occasional fish swap meets of the local societies etc.