I-Mockery.com | The Underappreciated Art of Firecracker Labels!: "I was happy to find out recently that I'm not alone in my admiration for firecracker art, because there's a decent amount of people on eBay who do nothing but sell and collect the labels. I've actually seen some labels go for over $100... and why shouldn't they? It's just as valid an art form as any other kind right? "
The estimable Neal Barrett, Jr. clued me in to this site. Some great labels, including "Metallic Crocodile."