My white Duo-R finally came today after taking a while to swim across Pacifc ocean. It arrived fine and looks very good, like it hasn't been used much. I do need to check for minor video problem, the seller reported infrequent video glitches, which suggest probably bad solder joint on AV connector, one of the component or on HuC6260 chip. I did a quick check, there is no sign of cap issue so it should be OK for now.
Still waiting for that AV cable. I swear USPS is getting slower every day!