Radio Shack has really gone downhill over the years. Once upon a time they had a great selection of electronics and components as well as their line of computers. They also seemed to have folks on hand who knew about the things that their customers were interested in (mainly computers, ham radio, and electronics).
I've found that that is no longer the case. There are still a couple of cabinets of components and a few odds and ends for the hobbyist around, but nobody seemed to know anything about electronics. The conversation with the person helping me last time I was in a Radio Shack went sort of like this. Bear in mind, I was talking to the manager:
"Do you have any 40 pin ZIF sockets?"
*blank stare from manager*
"It's a holder for chips...they're usually green with a little lever."
"Well, we have some chips in the cabinets over there..." he tells me, pointing at the dusty cabinets.
"Ok, nevermind. I also need a 3.5 volt battery, the kind that solders onto a circuit board. Like this one." I show him the dead one that I took off the board.
He looks at it, then at me as if I'd handed him a fragment of the dead sea scrolls to decipher. "Where did you get that?"
"The memory expansion board from an Amiga 500."
Yet another blank stare. He then tries to tell me that if I have the room or if I want to tape it on the outside of the "thing" he had AA battery holders that I could use. Just solder the leads to the board...
I politely declined, went back home,found what I needed online, and had it delivered to my door in a few days.