Nintendo Wii new or used

I am looking for a gently used Wii system for my 7 yr old daughter. She currently has a VERY used playstation 2 which is on it's last leg...seriously, the power cord has to be weighted down in order to work. She is in 3rd grade and doing Excellent in school(5th gr level!). I am disabled so money is low.I would like to have this by her birthday, October 5th, or at least Christmas. All of her friends have dozen's of games she can borrow for it, so games are not an issue. Just needs the system. Thx