How much do you get for a nitendo ds game?

I have 7 nitendo ds games that I want to sell. I dont want to sell them online though. I was wondering how much do you get for a nitendo ds game at game stop? I also have some game boy games that I want to sell also. I want to buy an iPod touch with my money.How much do you get for a nitendo ds game?try craigslist and probably 10 dollars each if you are extremely lucky