Amazon has sold-out Kindle 3 which is the cheapest e-Reader device released by the Seattle based Retailer. The company introduced two versions of new Kindle. The cheapest one, which only comes with Wi-Fi capability costs $139 whereas the price of Wi-Fi + 3G Amazon Kindle 3 is $189.

“Due to strong customer demand, Kindle is temporarily sold out. Order now to reserve your place in line.” Amazon.com says on the Kindle 3 page. Not all Amazon Kindle models are out-of-stock, Amazon has Kindle DX available on its website but 9-inch Kindle DX costs $379 and it doesn’t support Wi-Fi connectivity.

New Amazon Kindle 3 has 6-inced High Contrast e-Int Screen which according to product description remains bright even in Sunlight. The devices comes with new and improved font types. The third-generation Kindle is 21% smaller and 17% lighter than its previous version.

Amazon.com claims that Kindle 3 turns pages 20% faster than Kindle 2.