If your Goodwill is like mine, there is usually an abundance of old ginger jar lamp bases that look similar to the ones pictured here:
Seriously. They are most likely disguised by a coat of dust and sometimes a sad shade of country blue:
I found this one for the attractive price of $3 and thought the short round shape would make a great little desk lamp.
After sponge brushing on a couple of coats of the green I used to paint this, and adding a $7 shade I found at a consignment store:
I decided to leave the lamp base brass. . . .You can see my paint job was not perfection, but I can live with it.