Probably not. Only if you get a really bad quality 3DS or if you sell some games for your DSi aswell.
You can't trade JUST you DSi system in for a 3DS system anywhere.
No, the DSi isn't the same in money value as the 3DS is.
You can trade in a DSi for money off a 3DS yes. Be warned that the trade in price for a DSi is at rock bottom pretty much.
You can Trade a DSI in at Gamestop, they will give you credits for your DSI to buy something else, such as a 3DS.
I am 99.99% sure that you cannot trade in the DSi XL for a 3DS without needing to pay or trade extra.* But what you could do is trade in your DSi XL with a couple games and extra cash, and you should have saved up enough to get your 3DS.*You would have to find an extremely good deal, and I don't think it would be possible.
You can trade in your DSI at Best Buy for about $40.
yes, at Gamestop Trade your DSi XL and get $100 in-store credit toward the reservation of a 3DS, trade in your DSi and get $75 or trade in your DS lite and get $50.
Yes you can.
A DSi can be traded for $75, and the 3DS costs $250. Trading a DSi for a 3DS would cost you about $175 without tax.
Ds light is $50, Dsi is $70 and Dsi Xl is $100
There is no such thing as a 3DS DSi.
There is no DSI 3DS comming out, the 3DS has DSI features and the 3DS is the new version of the DSi but, remember the 3DS is 3D, Seeing is believing.