The recent post about how to buy telefang has encouraged me to start searching eBay again:
http://cgi.ebay.com/BUGSITE-LIMITED-GAME-BOY-COLOR-ADVANCE-SP-JAP-B-N_W0QQitemZ230383088784QQcmdZViewItemQQptZFR_SK_Jeuxvideo_Games_VideoGames?hash=item35a3e6f490
http://cgi.ebay.com/NINTENDO-GAMEBOY-NETWORK-ADVENTURE-BUGSITE-BUG-RPG-RARE_W0QQitemZ320452819759QQcmdZViewItemQQptZUS_Vintage_Video_Games?hash=item4a9c79fb2f
I also found both versions of DD2, but they were $50US plus $10 shipping, so I'd doubt anyone here would be too interested.