RadioShack was my favorite store as a kid. Here's some of the stuff I had
Electronics: 50 in 1, 60 in 1, 200 in 1 (the 80s one, just like Dave had), many many parts, that stupid "computer" thing with the lights that switched on and off.
Meters: One similar to what Dave had, but with more ranges and the "Range Doubler" switch. I also had a smaller pocket one. My dad had a digital meter that was about the size of an iPhone that had a pocket case. Oh yeah forgot about my digital meter. It was made by Metex, and had a serial port on the side that you could use with some software that came with it.
Mimms Books: Getting Started in Electronics, Engineer's Mini Notebook, Digital Circuits (forget the exact name)
Computers: TRS-80 MC-10 with 16K expansion, Color Computer 2 (64K), Tandy 1000 HX (final config was 3x 3.5" drives, 640K)
Misc: A 200 channel scanner, and an unserialized engineering prototype 2 channel CB radio that I got at the RadioShack Clearance center. It even had a sticker that said "Engineering Sample" on it, I don't know how it got out, but it was, as far as I could tell a final revision of the product.
Stories: The RadioShack Clearance center just outside of Downtown Fort Worth had a monthly swap meet for HAM guys. Lots of neat stuff there.
At 18, I worked at Incredible Universe, which was one of Tandy's attempts to compete with large retailers like Best Buy. My original job was a service coordinator. I would sit in the back room and wait for the repairs to come in from the Tandy Service Center (on North East Loop 820, in Fort Worth). Then I would open all the packages, call all the customers, and log it in the computer.
Most of the Realistic brand products were rebadged RCA, Philips, Magnavox etc products. I had a set of Yamaha speakers that I bought at Incredible Universe that after a few years had started rattling internally. They had a 5 year warranty so I sent them off to the Tandy Service Center. They somehow lost them and after a couple of months of fighting, they gave me a refund. Since Incredible Universe no longer carried those speakers I just happened to go to Radio Shack and saw the EXACT same speaker set branded as Optimus. So I bought those instead.
A year or so ago, I had heard that Radio Shack was clearancing out a lot of kits, so I picked up a Velleman PIC development board (the one with the bit-bang serial), and a PIC based Velleman Tennis game. Both were $5
There is still nowhere else that I know of that's within driving distance of anyone's house in the US that you could go to if you needed a capacitor RIGHT NOW. Sure you could look up a repair shop (if many are still around) and buy one. But they typically close at 5:00 and aren't open on the weekends typically.