Kmart offers the Kyocera Coast No-Contract Prepaid Phone for Boost in Black, model no. KYS2151ABB, for $9.99. Opt for in-store pickup to dodge the $5.99 shipping fee. That's the lowest price we could find by $20. It features a 2.4" color LCD, 1.4" external color LCD, Bluetooth, and up to six hours of talk time.