I agree with 1 and 3.
1. Radioshack used to be awesome as they stocked things you needed. For hobby electronic projects, but they do so less and less. That aside, as it likely doesn't make much sense for them to stock that kind of stuff, their prices are just off the wall stupid on so many items. Good ridence, i hope they diaf.
2. Every town pretty much has a hardware store. If they got there before Home Depot, they have a shot of hanging in there, and they have. I don't know a lot about these stores though, talking out my ass here.
3. Duh.
4. Don't know anything about these stores, nor care.
5. Shipping is all about economies of scale, and the USPS has scale. Yes it is a mismanaged and slow to innovate company, but they often have the best shipping rates by far (for individuals). I ship packages pretty much exclusively by USPS, you just can't beat the price of parcel post, and some of the flat rate priority stuff. The USPS ain't that bad, it should stick around.