Apple has been successfully using the Good, Better, Best three-tiered pricing model for quite some time. I remember buying a Powerbook 140 at the time when I re

Apple has been successfully using the Good, Better, Best three-tiered pricing model for quite some time. I remember buying a Powerbook 140 at the time when I really wanted the 170 but could not justify the increased price. From wikipedia: "Intended as a replacement for the Portable, the 140 series was identical to the 170, though it compromised a number of the high-end model's features to make it a more affordable mid-range option. The most apparent difference was that the 140 used a cheaper, 10 in (25 cm) diagonal passive matrix display instead of the sharper active matrix version used on the 170. Internally, in addition to a slower 16 MHz processor, the 140 also lacked a Floating Point Unit (FPU) and could not be upgraded. It also came standard with a 20 MB hard drive compared with the 170's 40 MB drive."