yes
If you mean buy one without a box then yes. Simply go to gamestop and buy a used one.
In the USA the Nintedo DSi at Gamestop or Walmart can be about 169.99 plus tax.
No it's better to trade it in.
Yes you can trade a DSi for a DS Lite at Gamestop.
a poopy crapy used broken dsi at gamestop is about $200.99.
$150.00
Wal-Mart & GameStop
The amount of money that GameStop will give you depends on 2 things, what type of condition of the DSI is in, and the store that you are in
You can buy a specific SD card for the DSi at GameStop.
you can do that in your local gamestop
You can Trade a DSI in at Gamestop, they will give you credits for your DSI to buy something else, such as a 3DS.
$30