in the 80s you could still by components.
now it is a telephone store and a mediocre one at that.
You still can, they're just so small a part of the mix now - and the selection isn't what it used to be. They do carry Arduino stuff tho'.
They do have parts but yes it is more cellphone and tv and other gadgets now then when I use to go back in the 70’s....
http://www.radioshack.com/category/index.jsp?categoryId=2032230