At job I bought a Xerox Phaser printer, and it's not bad. That printer has an optional kit to that enables to take extra thick media. Cool, I say, and I order it. I open the box, that is a normal dvd case, and the content is this:
The kit it's just a cheap spring??????? 
Before that I tell you how much this spring is sold, let's do a survey: How much this spring is sold for?
After answering the survey, you can see the price on the official Xerox price list.