You've still got about a week to get your fireworks. If you're around Seattle that means heading out to the Muckleshoot Reservation just south of Auburn. For a few weeks before July 4th, tribe members make a significant portion of their annual income from the parking lot full of fireworks stands. Of course the very best bargains are to be had in the 2-3 days following the holiday. Keep in mind that it's illegal to leave the reservation with explosives.
And I've linked to this website before, but it's well worth a second visit. Crackerpacks is a compendium of artwork from hundreds of firecracker labels from around the world, from the 1950's through today. Fun for hours and clicking won't burn your fingers. Ka-BOOM!
Thank you Grg Kimball for the photo above!