I just noticed something that seems to be a pretty big error on the system rarities on this database. The Atari 2600 and the Sears 6 switcher is listed as a rarity 2, and the Atari 4 switcher and Sears 4 switcher are listed as a rarity 3. The six switcher was made in 1977, 1978, and 1979. And the 4 switcher was made in 1980 on up. Before Space Invaders came along in 1980 the Atari 2600 was popular but not extremely popular. Once this game hit the markets it's a known fact that Atari started selling these systems in much larger quantities. There is no way that the 4 switcher should be listed as rarer than the six switcher. If anything the six switcher should be the rarity 3 and the 4 switcher should be the rarity 2. Just take a look on ebay anyday of the week and it becomes extremely obvious that the 4 switcher is much much more common.