I did some research and found stuff related to NDS and GBA for you guys. They are all rumors so watch out.
Walmart will sell GBA system for $39.99 : Awsome deal.
Toys R Us will have selected GBA games for $9.99 each.
Sears will have 30% off all toys: Yeah, they sell GBA and NDS. The question is: 'Are GBA and NDS toys?
Meijer will sell GBA system with three games of your choice for $78.88: Walmart's deal is still better.
If you want to find more deals or other stuff see.
http://www.bf2004.net/