You can't actually 'upgrade' and old iPod touch to a 4th gen. You could sell your old ipod and use the money plus some extra to buy a 4th gen.
Yes, in fact $100 is the most common price of an iPod touch (depending on how long that iPod touch generation has been out). For instance the fourth generation iPod touch would most likely cost more than the third generation. Hope that helped!
I'm pretty sure I got this 8 gigabyte for $240. It's totally worth it, buy it!
10$
Any iPod touch first or second generation comes with WIFI it is no extra charge for the the WIFI but in order to use it im not possible but you mite have to buy the firmware upgrade witch the newest is (Version 3.0) and it cost 15 dollors
235
$299.00
Starting at $229.
It costs $99.99
$275
How much will the ipod touch 5th generation cost
It is already out........ it cost the same pretty much
$200