I always avoid listings of game systems or micro computers that say they are untested and offer no returns, That's pretty much Ebay lingo for "It doesn't work, buy it and it's your problem now."
Jin - a couple of years ago I saw an auction where a guy claimed an item as 'untested' due to lack of a power supply... but when I checked his other auctions he was selling the power supply as a separate item. Needless to say I did not buy.
I can forgive RF only stuff as many people pull from sto and no longer have (or are scared of the new TV) RF input TV. I prefer CRT and have, like over a dozen. Some good deals are untested, maybe!?!