I know squat about the Dreamcast system. Always been interested in getting one though, since I loved Sega back during the days of the Mega Drive. While checking a local auction site, I noticed that there was a system for sale, including one controller and a garbage game I would never play. Anything else I should check for on the site before I start bidding? Also on the site, someone else had a SD card reader that apparently plugs into the system to use that instead of burnt CD-Rs for game storage. Is such a device worth a purchase? I understand CD-Rs don't hold as much data as the Dreamcast discs. Lastly, does the system have any sort of region lock for official or backup discs? I'll be trying to buy discs when I can (though the ability to play backups will be important until I can get a library to be proud of) but want to know if I need to stick to local releases, or if I can ask some US friends for their unused Dreamcast games.