Today, the Moto X is showed up on the Best Buy site for Verizon, AT&T, and Sprint in both the white and black colors for $199.99 (with 2-year contract) or $699.99 without contract. Yesterday, Leo Laporte stated that carriers are only paying $350 for the Moto X, so he believe it would be $199.99 - which is confirmed by the listings on the Best Buy site.
Source: http://www.phonearena.com/news/Moto-X-smartphone-appears-on-the-Best-Buy-site_id46273
Source: http://www.phonearena.com/news/Moto-X-smartphone-appears-on-the-Best-Buy-site_id46273