For what I currently have, I have bought:
New PS3 Slim - $215
HDMI Cable - $2
PS2->PS3 controller adapter - $15
$50 PSN card - $40
With tax about $275.
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For the Wii I bought:
Console w/Wii Sports - $250
Extra Wiimote and Nunchuck - $65
Double Wiimote charging station - $35?
Wiimote and Nunchuck skin set - $20
2000 Nintendo Points - $20