The bulbs that keep on giving
Several years ago I got a couple of Amaryllis bulbs on clearance after Christmas. I wasn't very interested in these plants since I had never seen one in person before, but for $1 or whatever the ridiculously low price was, I'd take a chance.
Five or six years later, these plants have been blooming for me every winter, requiring almost no attention during the summer growing season. The only thing I need to do is remember to move them into a dark corner of the garage in early autumn.