Cheap Wireless Router for Nindendo DS

Recently, for the holidays, I received a new Nintendo DS with Wi-Fi Connection. I do not have a wireless router, and if I get one it will be the first time ever using wireless connections. If any one knows of a short range Wireless router that is under $50 I would love to know. And if anyone has experience setting up a Nintendo DS to a wireless connection I would love the extra information!

Thanks in advance!