That will depend on what sellers currently have available and how big of a demand there currently is. EBay is certainly a great place to start but to get the best deal it may take some patience.
You can get it from amazon, i think it is the cheapest
Obviously the Tata Nano.
I would look at the Apple site. They have all sorts of accessories you can buy.
It is possible to buy a packaged deal for the iPod Nano that includes car accessories. This deal may be harder to find but is available at select stores.
Amazon includes many listings for iPod Nano accessories. These listings include chargers, packs, and bundles which may include many accessories. Prices will vary depending on the listing and on what is included.
iPod Classic, iPod Nano 1st Generation, iPod Nano 2nd Generation, iPod Shuffle, iPod Nano 3rd Generation, iPod Nano 4th Generation, iPod Touch, iPod Nano 5th Generation.
The iPod nano 2nd generation 4GB model was available in red at a retail price of $199 USD, although it was replaced by the iPod nano 3rd generation in September 2007 (the 3rd generation 8GB model is available in red for the same price). It may still be available from some retailers.
the new ipod nano is 6th generation
There is no such thing as a 7th generation I pod Nano. It only goes up to a 6th generation I pod Nano. I looked it up on Wikipedia and they have no records of a 7th generation.
how to unlock a ipod nano 4th generation
Unfortunately no, only the Apple Ipod Touch has that feature available.
im not sure but ask a person in a store