On getintothegame.com's weekly special section it has halo 2 as part of the 2 for $30.
Games 2 for $30 at Target. Choose from ATV Offroad Fury (PS2), Halo 2 (XBX), Red Dead Revolver (PS2, XBX), SOCOM II (PS2), Burnout 3 (PS2, XBX), Ratchet Clank 2 Commando (PS2), Super Mario Sunshine (GC)...