Still available with cheapest price $23.89 with Prime
Amazon has Firefly: Blue Sun for $23.99-$24.03. There are a bunch of different vendors each within a penny or two more or less. The cheapest is MTGEmporium which only has a few reviews and a relatively low score. The second choice is back ordered but I got mine for $24.01 from The Giraffe's Stache, LLC.