I wouldn't necessarily describe the differences in pricing on parts as based on "greed". Like any other product if one shops carefully one can minimize the cost hit. With respect to the lines of reputable manufacturers previous posters are correct. The more expensive lines tend to be light and durable. The cyclist has to make the determination as to how much they are willing to pay for these traits. For my own purposes (commuter on a 7 mile round trip commute and recreational rider in the 40-50 mile per weekend day tour range) mid range Shimano parts are adequate, and don't strain my budget.

Larry