It depends on which series you get. If it's the original DS ones from 5 years ago, it would probably be around the 10 dollar range. If it is the 3ds version I'm guessing in the 40 dollar range.
it is worth about 30.00 and 40.00 bucks
Nintindogs is a child's game and it would be considered inapropriate in many adults eyes
34$
not worth it. sell it on eBay
at gamestop around 50 0r 60 dollars
less than 20 cents at gamestop
either 90 or 100 im not sure
50$ don't trade it in. sell it on Craigslist or something.
twenty or so quid
I was offered twleve bucks at GameStop
it is about 20 or 15 bucks i think
You will not get much it depends on if it has been used or if its scratched or if its missing the code.