According to Wikipedia, artichokes are so named because you can choke on the heart of them. I can't vouch for that etymology, but these huge examples of the globe artichoke (about 4-5 inches in diameter) on sale Iovine Brother's Produce in the Reading Terminal Market today certainly require more than one bite. They were priced at two for a buck.
Another frequently dear item that could be found at a bargain price: limes. Five for a buck.