Video Game Systems

Hello i went out and purchased a (3.5mm stereo mini phone plug to duel RCA plug cable) because i want to hear my movies and songs from my computer through my sound system how would i go about this? any help would be much appreciated

I have 3 actual wiimotes,
2 Classic controllers
2 Nunchucks
Wii console w/ original box
14 Games, One of which is DDR Hottest dance party 2, with dance pad controller.
Also a Rechargable Battery station for rechargable batteries specially made for the wiimotes.
Its nearly in brand new condition. No scratches or anything.

How much can I get? Opinions welcomed.

I recently bought guitar hero 3 for the xbox 360 and it came with the gibson wireless guitar. Whenever i get star power or anything it will automatically activate the star power. Ive tried just about everything from re-syncing the controller to changing the batteries thinking it would make a difference. Whats wrong with the controller? because the same thing is happening with my friends.

I live in Toronto, and I just wanted to know where is the best place (they will pay the most to take my games and stuff off my hands or best trade) for me to sell my game consoles and games and accessories.
No EB Games they are ripoffs and forget store credit with them.