Sega Dreamcast with USB GD-ROM 

From the description: Up for sale here is a Sega Dreamcast equipped with the incredibly hard to get-a-hold-of USB GD-ROM loader. The battery has been replaced with a 90 degree CR2032 battery holder, a new battery is installed. The 12V rail has been removed to reduce heating effects. Comes with one controller, 1 VMU power cable and a composite/ s-video cable. Loaded 128 USB stick and the lid-switch is installed for multi-disc titles.

Auction from the US.
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