Account upgrades are still $99.00, but this is the best deal I have seen.
Amazon.com: HTC One, Silver (Sprint): Cell Phones & Accessories _1_1?ie=UTF8&qid=1373465160&sr=8-1&keywords=sprint+htc+one
Amazon.com: HTC One, Silver (Sprint): Cell Phones & Accessories _1_1?ie=UTF8&qid=1373465160&sr=8-1&keywords=sprint+htc+one