I like this article since it points out what alot of RPi’ers already know, its going to run you more around a $100 to get started with Raspberry Pi than $35. It requires a beefier microUSB power supply than normal, SD card, maybe a case, input devices (keyboard, etc), cables… Now in my case, I already had 1/2 the materials at hand. Oh and don’t forget the $10-12 in shipping and handling and tax.
http://www.makeuseof.com/tag/what-is-the-true-cost-of-running-a-raspberry-pi/