Amazon has a nice discount on this car charger for iPhone and iPod users. This Cellet ‘Apple Certified’ Retractable Car Charger for Apple iPhone 4/4S, iPhone 3G/3GS, iPod Touch and Nano is only $6.47 right now (reg. $19.99) and ships for free!
Amazon can change their prices at any time so please verify the current price before buying. Check it out here!