Don't forget to look on e-bay for some items. I have bought large
ammounts
of components for a few dollars.

What category is used for components? I see Radio Equipment, and
specific big ticket items.

Look under"Business & Industrial" and subcategory of "electronic Components"
Then simiconductors or passive components or whatever you are looking for.
You can get individual types of items or there are some things you may want
to get such as power cubes or asymblies to strip out for parts.

YOu can also find some test gear and tools under the same catagory.